CSES - Putka Open 2020 – 1/5

Submission details
Task:	Lista
Sender:	Hannes
Submission time:	2020-09-06 17:40:04 +0300
Language:	C++ (C++11)
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	21
#2	ACCEPTED	38
#3	ACCEPTED	41

Test results
test	verdict	time	group
#1	ACCEPTED	0.01 s	1, 2, 3	details
#2	ACCEPTED	0.01 s	1, 2, 3	details
#3	ACCEPTED	0.01 s	1, 2, 3	details
#4	ACCEPTED	0.01 s	1, 2, 3	details
#5	ACCEPTED	0.01 s	1, 2, 3	details
#6	ACCEPTED	0.01 s	1, 2, 3	details
#7	ACCEPTED	0.01 s	1, 2, 3	details
#8	ACCEPTED	0.01 s	1, 2, 3	details
#9	ACCEPTED	0.01 s	1, 2, 3	details
#10	ACCEPTED	0.01 s	2, 3	details
#11	ACCEPTED	0.01 s	2, 3	details
#12	ACCEPTED	0.01 s	2, 3	details
#13	ACCEPTED	0.01 s	2, 3	details
#14	ACCEPTED	0.01 s	2, 3	details
#15	ACCEPTED	0.01 s	2, 3	details
#16	ACCEPTED	0.01 s	3	details
#17	ACCEPTED	0.01 s	3	details
#18	ACCEPTED	0.01 s	3	details
#19	ACCEPTED	0.02 s	3	details
#20	ACCEPTED	0.02 s	3	details
#21	ACCEPTED	0.03 s	3	details

Compiler report

input/code.cpp: In function 'void shufflert(int)':
input/code.cpp:15:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0;i<rt[c].size();++i) {
                ~^~~~~~~~~~~~~
input/code.cpp: In function 'void addnxt(int)':
input/code.cpp:31:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0;i<rt[c].size();++i) {
                ~^~~~~~~~~~~~~

Code

#include <bits/stdc++.h>
using namespace std;
int n;
const int N=2020;
int p[N];


vector<int> rt[1010];

int prv[1010];
int nxt[1010];
deque<int> znxt;

void shufflert(int c) {
  for (int i=0;i<rt[c].size();++i) {
    swap(rt[c][i], rt[c][rand()%(i+1)]);
  }
}

bool find(int a, int b) {
  while (nxt[a] && a!=b) a=nxt[a];
  return a==b;
}

void addnxt(int c) {
  if (!rt[c].size()) {
    znxt.push_back(c);
    return;
  }
  shufflert(c);
  for (int i=0;i<rt[c].size();++i) {
    int w=rt[c][i];
    if (find(w, c)) continue;
    nxt[c]=w;
    if (prv[w]) {
      nxt[prv[w]]=0;
      znxt.push_back(prv[w]);
    }
    prv[nxt[c]]=c;
    return;
  }
  znxt.push_back(c);
}

bool solve(int n) {
  for (int i=1;i<=n;++i) rt[i].clear(), nxt[i]=0, prv[i]=0;
  
  for (int i=1;i<=n;++i) {
    for (int j=i+1;j<=n;++j) {
      if (!p[i+j]) {
        rt[i].push_back(j);
        rt[j].push_back(i);
      }
    }
  }
  
  znxt.clear();
  
  for (int i=1;i<=n;++i) addnxt(i);
  int loops=0;
  while (znxt.size()>1 && ++loops<10000) {
    int c=znxt.front();
    znxt.pop_front();
    if (nxt[c]) continue;
    addnxt(c);
  }
  
//   for (int i=1;i<=n;++i) cout << nxt[i] << " ";cout << endl;
//   for (int i=1;i<=n;++i) cout << prv[i] << " ";cout << endl;
  
  
  int c=znxt.size()?znxt.front():1;
  for (int i=0;i<n;++i) {
    cout << c << " ";
    c=prv[c];
  }
  cout << endl;
  return 1;
}

int main() {
  p[0]=1;p[1]=1;
  for (int i=2;i<N;++i) {
    if (p[i]) continue;
    for (int j=i+i;j<N;j+=i) p[j]=1;
  }
  /* 
  for (int i=1;i<1000;++i) {
    if (!solve(i)) { cout << "QAQ\n" << endl; return 0;}
    cout << i << endl;
  }
  return 0;//*/
  cin >> n;
  if (!solve(n))  cout << "QAQ\n" << endl;
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
`2` view save

correct output
`1 2` view save

user output
`2 1` view save

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
`3` view save

correct output
`1 2 3` view save

user output
`3 2 1` view save

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
`4` view save

correct output
`1 2 3 4` view save

user output
`4 1 2 3` view save

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
`5` view save

correct output
`3 4 1 2 5` view save

user output
`5 2 1 4 3` view save

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

input
`6` view save

correct output
`3 4 1 2 5 6` view save

user output
`2 5 6 1 4 3` view save

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

input
`7` view save

correct output
`3 4 1 2 5 6 7` view save

user output
`1 6 5 2 3 4 7` view save

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

input
`8` view save

correct output
`7 6 5 2 1 4 3 8` view save

user output
`8 3 4 7 6 1 2 5` view save

Test 8

Group: 1, 2, 3

Verdict: ACCEPTED

input
`9` view save

correct output
`7 6 5 2 1 4 3 8 9` view save

user output
`9 4 1 2 3 8 5 6 7` view save

Test 9

Group: 1, 2, 3

Verdict: ACCEPTED

input
`10` view save

correct output
`7 6 5 2 1 4 3 8 9 10` view save

user output
`7 4 3 2 1 6 5 8 9 10` view save

Test 10

Group: 2, 3

Verdict: ACCEPTED

input
`19` view save

correct output
`17 14 3 8 15 16 13 6 5 2 1 4 9...` view save

user output
`13 16 3 14 9 2 15 4 19 10 7 12...` view save

Test 11

Group: 2, 3

Verdict: ACCEPTED

input
`56` view save

correct output
`55 54 53 50 51 52 49 48 13 28 ...` view save

user output
`53 30 41 32 11 12 55 18 13 6 1...` Truncated

Test 12

Group: 2, 3

Verdict: ACCEPTED

input
`70` view save

correct output
`67 4 1 2 9 32 35 38 65 66 61 4...` view save

user output
`53 18 23 20 51 58 31 30 43 10 ...` Truncated

Test 13

Group: 2, 3

Verdict: ACCEPTED

input
`76` view save

correct output
`73 66 61 42 59 54 53 50 51 52 ...` view save

user output
`6 1 30 31 42 11 60 7 4 55 48 2...` Truncated

Test 14

Group: 2, 3

Verdict: ACCEPTED

input
`90` view save

correct output
`87 86 11 18 29 44 45 16 55 58 ...` view save

user output
`16 15 14 83 90 41 48 55 52 87 ...` Truncated

Test 15

Group: 2, 3

Verdict: ACCEPTED

input
`100` view save

correct output
`97 96 95 78 25 82 81 56 71 68 ...` view save

user output
`64 73 58 43 30 97 42 17 92 35 ...` Truncated

Test 16

Group: 3

Verdict: ACCEPTED

input
`154` view save

correct output
`151 6 5 92 137 134 149 84 143 ...` view save

user output
`37 30 151 142 97 54 35 38 69 6...` Truncated

Test 17

Group: 3

Verdict: ACCEPTED

input
`430` view save

correct output
`427 426 371 372 367 376 375 35...` view save

user output
`400 121 268 415 16 213 230 47 ...` Truncated

Test 18

Group: 3

Verdict: ACCEPTED

input
`629` view save

correct output
`627 404 227 146 83 150 77 74 3...` view save

user output
`535 304 337 484 285 434 165 43...` Truncated

Test 19

Group: 3

Verdict: ACCEPTED

input
`833` view save

correct output
`829 828 793 574 523 516 515 51...` view save

user output
`523 708 25 154 519 568 219 350...` Truncated

Test 20

Group: 3

Verdict: ACCEPTED

input
`885` view save

correct output
`883 724 723 878 881 726 721 71...` view save

user output
`755 56 383 230 443 434 107 666...` Truncated

Test 21

Group: 3

Verdict: ACCEPTED

input
`1000` view save

correct output
`997 996 737 884 995 492 991 20...` view save

user output
`598 135 146 33 26 621 208 385 ...` Truncated

Putka Open 2020 – 1/5

Lista

Compiler report

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Tasks

Submissions (Hannes)