CSES - IZhO 2017, day 2 - Results
Submission details
Task:Bomb
Sender:henrikaalto
Submission time:2019-02-10 21:42:23 +0200
Language:C++
Status:READY
Result:12
Feedback
groupverdictscore
#10
#2ACCEPTED1
#3ACCEPTED1
#4ACCEPTED1
#50
#60
#7ACCEPTED1
#80
#90
#10ACCEPTED1
#110
#12ACCEPTED1
#13ACCEPTED1
#14ACCEPTED1
#150
#16ACCEPTED1
#17ACCEPTED1
#180
#190
#200
#210
#220
#230
#240
#250
#26ACCEPTED1
#270
#280
#290
#300
#310
#320
#330
#340
#350
#360
#370
#380
#390
#400
#41ACCEPTED1
#420
#430
#440
#450
#460
#470
#480
#490
#500
#510
#520
#530
#540
#550
#560
#570
#580
#590
#600
#610
#620
#630
#640
#650
#660
#670
#680
#690
#700
#710
#720
#730
#740
#750
#760
#770
#780
#790
#800
#810
#820
#830
#840
#850
#860
#870
#880
#890
#900
#910
#920
#930
#940
#950
#960
#970
#980
#990
#1000
Test results
testverdicttimegroup
#10.01 s1details
#2ACCEPTED0.01 s2details
#3ACCEPTED0.13 s3details
#4ACCEPTED0.14 s4details
#50.04 s5details
#60.04 s6details
#7ACCEPTED0.02 s7details
#80.01 s8details
#90.02 s9details
#10ACCEPTED0.01 s10details
#110.02 s11details
#12ACCEPTED0.01 s12details
#13ACCEPTED0.02 s13details
#14ACCEPTED0.03 s14details
#150.02 s15details
#16ACCEPTED0.02 s16details
#17ACCEPTED0.03 s17details
#180.02 s18details
#190.03 s19details
#200.01 s20details
#210.02 s21details
#220.02 s22details
#230.03 s23details
#240.02 s24details
#250.03 s25details
#26ACCEPTED0.19 s26details
#27--27details
#280.05 s28details
#29--29details
#300.34 s30details
#310.21 s31details
#320.16 s32details
#33--33details
#340.04 s34details
#350.08 s35details
#36--36details
#370.01 s37details
#380.27 s38details
#390.01 s39details
#40--40details
#41ACCEPTED0.01 s41details
#420.08 s42details
#430.28 s43details
#44--44details
#450.27 s45details
#460.31 s46details
#470.27 s47details
#480.28 s48details
#490.27 s49details
#500.27 s50details
#510.27 s51details
#520.27 s52details
#530.28 s53details
#540.27 s54details
#55--55details
#560.26 s56details
#57--57details
#58--58details
#59--59details
#600.27 s60details
#610.26 s61details
#620.27 s62details
#630.27 s63details
#64--64details
#650.28 s65details
#660.28 s66details
#670.28 s67details
#680.27 s68details
#69--69details
#70--70details
#71--71details
#72--72details
#73--73details
#74--74details
#75--75details
#760.28 s76details
#770.28 s77details
#780.27 s78details
#790.95 s79details
#800.87 s80details
#81--81details
#820.27 s82details
#830.28 s83details
#840.70 s84details
#850.28 s85details
#860.26 s86details
#87--87details
#880.26 s88details
#890.28 s89details
#90--90details
#910.28 s91details
#920.28 s92details
#930.28 s93details
#940.29 s94details
#950.27 s95details
#960.28 s96details
#970.27 s97details
#980.27 s98details
#990.28 s99details
#1000.27 s100details

Code

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define N (1<<17)
#define f first
#define s second
typedef pair<int,int> P;

char d[2501][2501];

int sum[2501][2501];

int n,m; 

int read() {
  int S=0;
  char c;
  while(1) {
    c=getchar_unlocked();
    if (c>'9' || c<'0')
      return S;
    S=S*10+c-'0';
  }
}

int que(int x1,int y1,int x2,int y2){
  x2=x2+x1-1;
  y2=y2+y1-1;
  if(n<x1||n<x2||m<y1||m<y2||x1<0||x2<0||y1<0||y2<0)return 0;
  return sum[x2][y2]-sum[x1-1][y2]-sum[x2][y1-1]+sum[x1-1][y1-1]<=0;
}

bool f(int x,int y){
  if(x==0||y==0)return 1;
  if(n<x||m<y)return 0;
  unordered_set<ll> sset;
  for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++)
      if(d[i][j]=='1')
        sset.insert(i*50000+j);
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      if(d[i][j]=='0') continue;
      int a=que(i,j,x,y);
      if(a){
        for(int iy=0;iy<x;iy++)
          for(int ix=0;ix<y;ix++){
            if(sset.end()!=sset.find(50000*(i+iy)+j+ix))
              sset.erase(50000*(i+iy)+j+ix);
          }
      }
    }
  }
  return sset.empty();
}

int main() {
  n=read(); m=read();
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      do{
        d[i][j]=getchar_unlocked();
      } while(d[i][j]!='0'&&d[i][j]!='1');
    }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      sum[i][j]=d[i][j]=='0';
      sum[i][j]+=sum[i-1][j];
      sum[i][j]+=sum[i][j-1];
      sum[i][j]-=sum[i-1][j-1];
    }
  }
  if(sum[n][m]==n*m)cout<<"0\n",exit(0);
  ll k=0;
  for(ll b=2500;b;b/=2)
    while(f(k+b,1))k+=b; 
  ll K=0;
  for(ll b=2500;b;b/=2)
    while(f(k,K+b))K+=b;
  cout<<K*k<<"\n";
}

Test details

Test 1

Group: 1

Verdict:

input
1 20
00001111101110011110

correct output
3

user output
20

Test 2

Group: 2

Verdict: ACCEPTED

input
20 1
1
1
1
0
...

correct output
2

user output
2

Test 3

Group: 3

Verdict: ACCEPTED

input
2499 1
1
1
1
1
...

correct output
38

user output
38

Test 4

Group: 4

Verdict: ACCEPTED

input
2499 1
1
1
1
1
...

correct output
55

user output
55

Test 5

Group: 5

Verdict:

input
1 2500
111111111110111111111110111111...

correct output
7

user output
11

Test 6

Group: 6

Verdict:

input
1 1000
111111111111111111111111111111...

correct output
33

user output
85

Test 7

Group: 7

Verdict: ACCEPTED

input
5 5
11111
11111
11011
11111
...

correct output
4

user output
4

Test 8

Group: 8

Verdict:

input
20 20
11111000000000000000
11111000000000000000
11111100000000000000
11111111111000000000
...

correct output
8

user output
4

Test 9

Group: 9

Verdict:

input
20 20
11111100000000000000
11111100000000000000
11111110000000000000
11111111111110000000
...

correct output
12

user output
5

Test 10

Group: 10

Verdict: ACCEPTED

input
14 13
0000011100000
0000011100000
0000011100000
0000011110000
...

correct output
4

user output
4

Test 11

Group: 11

Verdict:

input
20 19
1111110000000000000
1111111000000000000
1111111000000000000
1111111000000000000
...

correct output
10

user output
6

Test 12

Group: 12

Verdict: ACCEPTED

input
15 15
110000000000000
110000000000000
110000000000000
111000000000000
...

correct output
2

user output
2

Test 13

Group: 13

Verdict: ACCEPTED

input
15 11
00111000000
00111000000
00111000000
00111000000
...

correct output
3

user output
3

Test 14

Group: 14

Verdict: ACCEPTED

input
16 16
0000111100001111
0000111100001111
0000111100001111
0000111100001111
...

correct output
16

user output
16

Test 15

Group: 15

Verdict:

input
18 18
111110000000000000
111110000000000000
111110000000000000
111111000000000000
...

correct output
8

user output
5

Test 16

Group: 16

Verdict: ACCEPTED

input
20 20
11111111111111011111
11111111111111011111
11111111111111011111
11111111111111111111
...

correct output
20

user output
20

Test 17

Group: 17

Verdict: ACCEPTED

input
65 70
000000000000000011111000000000...

correct output
15

user output
15

Test 18

Group: 18

Verdict:

input
70 62
111100000000000000000000000000...

correct output
6

user output
4

Test 19

Group: 19

Verdict:

input
94 78
111111111111111100000000000000...

correct output
22

user output
19

Test 20

Group: 20

Verdict:

input
92 84
111111111111111110000000000000...

correct output
27

user output
19

Test 21

Group: 21

Verdict:

input
53 89
000001111000000000000000000000...

correct output
6

user output
4

Test 22

Group: 22

Verdict:

input
76 93
000011111100000000000000000000...

correct output
12

user output
6

Test 23

Group: 23

Verdict:

input
100 100
111111111111111111111111111111...

correct output
209

user output
22

Test 24

Group: 24

Verdict:

input
81 74
111111111111111110000000000000...

correct output
30

user output
20

Test 25

Group: 25

Verdict:

input
100 100
111111111111111111111111111111...

correct output
80

user output
33

Test 26

Group: 26

Verdict: ACCEPTED

input
100 100
111111111111111111111111111111...

correct output
132

user output
132

Test 27

Group: 27

Verdict:

input
295 268
111111111111111111111111111111...

correct output
3

user output
(empty)

Test 28

Group: 28

Verdict:

input
290 383
111111110000000000000000000000...

correct output
20

user output
14

Test 29

Group: 29

Verdict:

input
390 320
000000000000000000000000000000...

correct output
3038

user output
(empty)

Test 30

Group: 30

Verdict:

input
432 434
111111111111111111111111111111...

correct output
221

user output
103

Test 31

Group: 31

Verdict:

input
334 450
111111111111111111111111111111...

correct output
391

user output
75

Test 32

Group: 32

Verdict:

input
407 383
111111111111111111111111111111...

correct output
156

user output
110

Test 33

Group: 33

Verdict:

input
450 450
111111111111111111111111111111...

correct output
1235

user output
(empty)

Test 34

Group: 34

Verdict:

input
356 231
000000000001111111111110000000...

correct output
42

user output
40

Test 35

Group: 35

Verdict:

input
450 450
111111111111111111111111111111...

correct output
192

user output
20

Test 36

Group: 36

Verdict:

input
450 450
111111111111111111111111111111...

correct output
1404

user output
(empty)

Test 37

Group: 37

Verdict:

input
20 20
00000000001111111111
00000000001111111111
00000000001111111111
00000000001111111111
...

correct output
14

user output
6

Test 38

Group: 38

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
6250000

user output
(empty)

Test 39

Group: 39

Verdict:

input
20 20
00000000001111111111
00000000001111111111
00000000111111111111
00000001111111111111
...

correct output
24

user output
16

Test 40

Group: 40

Verdict:

input
875 882
111111111111111111111111111111...

correct output
69552

user output
(empty)

Test 41

Group: 41

Verdict: ACCEPTED

input
20 20
00000000111111111111
00000011111111111111
00000011111111111111
00000111111111111111
...

correct output
36

user output
36

Test 42

Group: 42

Verdict:

input
100 100
000000000000000000000000000000...

correct output
651

user output
196

Test 43

Group: 43

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
250500

user output
(empty)

Test 44

Group: 44

Verdict:

input
450 450
000000000000000000000000000000...

correct output
12864

user output
(empty)

Test 45

Group: 45

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
399456

user output
(empty)

Test 46

Group: 46

Verdict:

input
2500 2500
111111111111111111111111100000...

correct output
625

user output
(empty)

Test 47

Group: 47

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
395486

user output
(empty)

Test 48

Group: 48

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
3360

user output
(empty)

Test 49

Group: 49

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
28

user output
(empty)

Test 50

Group: 50

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
7348

user output
(empty)

Test 51

Group: 51

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
6622

user output
(empty)

Test 52

Group: 52

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
5593

user output
(empty)

Test 53

Group: 53

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
4545

user output
(empty)

Test 54

Group: 54

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
4067

user output
(empty)

Test 55

Group: 55

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
2806

user output
(empty)

Test 56

Group: 56

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
122500

user output
(empty)

Test 57

Group: 57

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
4674

user output
(empty)

Test 58

Group: 58

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
6272

user output
(empty)

Test 59

Group: 59

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
3337

user output
(empty)

Test 60

Group: 60

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
870

user output
(empty)

Test 61

Group: 61

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
532

user output
(empty)

Test 62

Group: 62

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
114271

user output
(empty)

Test 63

Group: 63

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
1560001

user output
(empty)

Test 64

Group: 64

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
62500

user output
(empty)

Test 65

Group: 65

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
1400

user output
(empty)

Test 66

Group: 66

Verdict:

input
2500 2500
000000111111111111111111111111...

correct output
9910

user output
(empty)

Test 67

Group: 67

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
9879

user output
(empty)

Test 68

Group: 68

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
16224

user output
(empty)

Test 69

Group: 69

Verdict:

input
2500 2500
000000000000000000000000000000...

correct output
6300

user output
(empty)

Test 70

Group: 70

Verdict:

input
2000 2000
111111111111111111111111111111...

correct output
59760

user output
(empty)

Test 71

Group: 71

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
40480

user output
(empty)

Test 72

Group: 72

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
137159

user output
(empty)

Test 73

Group: 73

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
32110

user output
(empty)

Test 74

Group: 74

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
10914

user output
(empty)

Test 75

Group: 75

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
124074

user output
(empty)

Test 76

Group: 76

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
4617

user output
(empty)

Test 77

Group: 77

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
106981

user output
(empty)

Test 78

Group: 78

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
44980

user output
(empty)

Test 79

Group: 79

Verdict:

input
2500 2500
111111111111111111111111110000...

correct output
1365

user output
214

Test 80

Group: 80

Verdict:

input
2500 2500
111111111111111111110000000000...

correct output
602

user output
270

Test 81

Group: 81

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
2709

user output
(empty)

Test 82

Group: 82

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
149556

user output
(empty)

Test 83

Group: 83

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
11289

user output
(empty)

Test 84

Group: 84

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
366

user output
20

Test 85

Group: 85

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
4814

user output
(empty)

Test 86

Group: 86

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
132

user output
(empty)

Test 87

Group: 87

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
589

user output
(empty)

Test 88

Group: 88

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
56448

user output
(empty)

Test 89

Group: 89

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
10044

user output
(empty)

Test 90

Group: 90

Verdict:

input
2000 2000
111111111111111111111111111111...

correct output
6384

user output
(empty)

Test 91

Group: 91

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
15330

user output
(empty)

Test 92

Group: 92

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
47759

user output
(empty)

Test 93

Group: 93

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
624

user output
(empty)

Test 94

Group: 94

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
16695

user output
(empty)

Test 95

Group: 95

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
19224

user output
(empty)

Test 96

Group: 96

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
89386

user output
(empty)

Test 97

Group: 97

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
243

user output
(empty)

Test 98

Group: 98

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
73840

user output
(empty)

Test 99

Group: 99

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
10764

user output
(empty)

Test 100

Group: 100

Verdict:

input
2500 2500
111111111111111111111111111111...

correct output
135

user output
(empty)