oj.uz

Submission #1075047

# Submission time Handle Problem Language Result Execution time Memory
1075047 2024-08-25T17:54:23 Z raduv Norela (info1cup18_norela) C++17
100 / 100
 413 ms 600 KB 
#include <stdio.h>
#include <vector>

const int MAXM = 24;

std::vector<int> v[MAXM];

int res;

int popcount(int a) {
  int cnt = 0;
  while(a > 0) {
    cnt++;
    a &= a - 1;
  }
  return cnt;
}

void bkt(int pos, int m, int n, long long mask, int op) {
  if(pos >= m) {
    if(mask == (1LL << n) - 1 && popcount(op) <= popcount(res)) {
      res = op;
    }
  } else {
    int i;

    bkt(pos + 1, m, n, mask, op);

    op |= (1 << pos);
    for(i = 0; i < (int)v[pos].size(); i++) {
      mask ^= (1LL << (v[pos][i] - 1));
    }

    bkt(pos + 1, m, n, mask, op);
  }
}

int main() {
  #ifdef LOCAL
freopen("input.txt", "r", stdin);
  #endif

  int n, m, i, x, j, a;

  scanf("%d%d", &n, &m);
  for(i = 0; i < m; i++) {
    scanf("%d", &x);
    for(j = 0; j < x; j++) {
      scanf("%d", &a);
      v[i].push_back(a);
    }
  }

  res = (1 << (m + 1)) - 1;
  bkt(0, m, n, 0, 0);

  x = popcount(res);
  printf("%d\n", x);
  for( i = 0; i < m; i++ ){
    if(res & (1 << i))
      printf("%d ", i + 1);
  }
  printf("\n");

  return 0;
}

Compilation message

norela.cpp: In function 'int main()':
norela.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d%d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~
norela.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     scanf("%d", &x);
      |     ~~~~~^~~~~~~~~~
norela.cpp:49:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |       scanf("%d", &a);
      |       ~~~~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 3 ms 348 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 3 ms 348 KB Output is correct
7 Correct 22 ms 348 KB Output is correct
8 Correct 45 ms 348 KB Output is correct
9 Correct 45 ms 344 KB Output is correct
10 Correct 31 ms 348 KB Output is correct
11 Correct 38 ms 348 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 3 ms 348 KB Output is correct
7 Correct 22 ms 348 KB Output is correct
8 Correct 45 ms 348 KB Output is correct
9 Correct 45 ms 344 KB Output is correct
10 Correct 31 ms 348 KB Output is correct
11 Correct 38 ms 348 KB Output is correct
12 Correct 58 ms 600 KB Output is correct
13 Correct 106 ms 344 KB Output is correct
14 Correct 99 ms 344 KB Output is correct
15 Correct 118 ms 344 KB Output is correct
16 Correct 97 ms 348 KB Output is correct
17 Correct 109 ms 344 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 344 KB Output is correct
2 Correct 5 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 4 ms 348 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 3 ms 348 KB Output is correct
7 Correct 22 ms 348 KB Output is correct
8 Correct 45 ms 348 KB Output is correct
9 Correct 45 ms 344 KB Output is correct
10 Correct 31 ms 348 KB Output is correct
11 Correct 38 ms 348 KB Output is correct
12 Correct 58 ms 600 KB Output is correct
13 Correct 106 ms 344 KB Output is correct
14 Correct 99 ms 344 KB Output is correct
15 Correct 118 ms 344 KB Output is correct
16 Correct 97 ms 348 KB Output is correct
17 Correct 109 ms 344 KB Output is correct
18 Correct 227 ms 348 KB Output is correct
19 Correct 224 ms 344 KB Output is correct
20 Correct 354 ms 344 KB Output is correct
21 Correct 413 ms 344 KB Output is correct
22 Correct 399 ms 348 KB Output is correct
23 Correct 388 ms 344 KB Output is correct