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Datatähti 2016 alku

Start:2015-09-28 00:00:00
End:2015-10-12 00:00:00
 

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CSES - Datatähti 2016 alku - Results
History
2015-09-28 23:25:44100
Task:Tontti
Sender:yhyy ääh yhyy
Submission time:2015-09-28 23:25:44
Language:C++
Status:READY
Score:100

Feedback

groupverdictscore
#1ACCEPTED14
#2ACCEPTED33
#3ACCEPTED53

Test results

testverdicttime (s)group
#1ACCEPTED0.06 / 1.001details
#2ACCEPTED0.06 / 1.001details
#3ACCEPTED0.06 / 1.001details
#4ACCEPTED0.06 / 1.001details
#5ACCEPTED0.06 / 1.001details
#6ACCEPTED0.07 / 1.002details
#7ACCEPTED0.07 / 1.002details
#8ACCEPTED0.07 / 1.002details
#9ACCEPTED0.06 / 1.002details
#10ACCEPTED0.06 / 1.002details
#11ACCEPTED0.43 / 1.003details
#12ACCEPTED0.43 / 1.003details
#13ACCEPTED0.31 / 1.003details
#14ACCEPTED0.32 / 1.003details
#15ACCEPTED0.32 / 1.003details

Code

#include <iostream>
using namespace std;
const int MN = 2222;
int t[MN][MN];
int getSum(int x1, int y1, int x2, int y2) {
    return t[x2+1][y2+1] - t[x2+1][y1] - t[x1][y2+1] + t[x1][y1];
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n,m,k;
    cin>>n>>m>>k;
    for(int i = 0; i < n; ++i) {
        for(int j = 0; j < m; ++j) {
            char q;
            cin>>q;
            if(q == '*') {
                t[i+1][j+1] = 1;
            }
                t[i+1][j+1] += t[i][j+1] + t[i+1][j] - t[i][j];
        }
    }
    long long ans = 0;
    for(int i = 0; i < n; ++i) {
        for(int j = 0; j < m; ++j) {
            int lo = 0; 
            int hi = min(n-i-1, m-j-1);
            int frst = 0;
            while(lo <= hi) {
                int mid = (lo+hi)/2;
                if(getSum(i, j, i+mid, j+mid) >= k) {
                    frst = mid;
                    hi = mid-1;
                }
                else {
                    lo = mid+1;
                }
            }
            if(getSum(i, j, i+frst, j+frst) != k) continue;
            lo = 0; 
            hi = min(n-i-1, m-j-1);
            int last = 0;
            while(lo <= hi) {
                int mid = (lo+hi)/2;
                if(getSum(i, j, i+mid, j+mid) <= k) {
                    last = mid;
                    lo = mid+1;
                }
                else {
                    hi = mid-1;
                }
            }
            if(getSum(i, j, i+last, j+last) != k) continue;
            ans += last-frst+1;
        }
    }
    cout<<ans<<'\n';
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
10 10 1
......*...
.......*..
*..*....*.
*....*....
...
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correct output
94

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user output
94

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Test 2

Group: 1

Verdict: ACCEPTED

input
10 10 5
**********
**********
**********
**********
...
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correct output
0

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user output
0

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Test 3

Group: 1

Verdict: ACCEPTED

input
10 10 10
**...*...*
*..*.**.*.
...**.*..*
*...**.*..
...
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correct output
4

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user output
4

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Test 4

Group: 1

Verdict: ACCEPTED

input
10 10 5
****......
*.*.**..**
....*.*..*
...*.***..
...
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correct output
16

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user output
16

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Test 5

Group: 1

Verdict: ACCEPTED

input
10 10 2
**.***..*.
...*.*....
.***.*...*
***.***..*
...
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correct output
30

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user output
30

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Test 6

Group: 2

Verdict: ACCEPTED

input
500 500 1
.................................
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correct output
9552040

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user output
9552040

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Test 7

Group: 2

Verdict: ACCEPTED

input
500 500 5
.................................
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correct output
1536063

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user output
1536063

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Test 8

Group: 2

Verdict: ACCEPTED

input
500 500 25000
**...*...**..*.*..*.**.*..*.*....
view   save

correct output
288

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user output
288

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Test 9

Group: 2

Verdict: ACCEPTED

input
500 500 12500
**.**.*..*...*.**...*.***........
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correct output
786

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user output
786

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Test 10

Group: 2

Verdict: ACCEPTED

input
500 500 5000
.*.*.**..*.*.**.**..*..**...*....
view   save

correct output
1763

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user output
1763

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Test 11

Group: 3

Verdict: ACCEPTED

input
2000 2000 1
.................................
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correct output
489611392

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user output
489611392

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Test 12

Group: 3

Verdict: ACCEPTED

input
2000 2000 5
.................................
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correct output
120725884

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user output
120725884

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Test 13

Group: 3

Verdict: ACCEPTED

input
2000 2000 400000
..*..**.**.**.*.***...**.*..**...
view   save

correct output
1849

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user output
1849

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Test 14

Group: 3

Verdict: ACCEPTED

input
2000 2000 200000
***.*....*.*..*....**..*..*.*....
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correct output
2665

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user output
2665

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Test 15

Group: 3

Verdict: ACCEPTED

input
2000 2000 80000
**.**...*.***.**....**.*....*....
view   save

correct output
5587

view   save

user output
5587

view   save