Submission #1074914

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074914		raduv	Norela (info1cup18_norela)	C++17	0 / 100	15 ms	348 KiB

norela

#include <bits/stdc++.h>
const int MAXM = 24;
const int MAXN = 60;
using namespace std;
long long v[MAXM];
int issmaller(int mask1, int mask2){
  int i;
  for( i = 0; i < MAXN; i++ ){
    if(((mask1 & (1 << i)) > 0) != ((mask2 & (1 << i)) > 0)){
      if(mask1 & (1 << i))
        return 1;
      return 0;
    }
  }
  return 0;
}
int main()
{
    int n, m, q, bit, i, no, mn, mask, cmask;
    long long rez;
    scanf("%d%d", &n, &m);
    for( i = 0; i < m; i++ ){
      scanf("%d", &q);
      while(q--){
        scanf("%d", &bit);
        bit--;
        v[i] |= (1 << bit);
      }
    }
    mn = m + 1;
    cmask = 0;
    for( mask = 0; mask < (1 << m); mask++ ){
      rez = no = 0;
      for( i = 0; i < m; i++ ){
        if(mask & (1 << i)){
          rez ^= v[i];
          no++;
        }
      }
      if(rez == (1LL << n) - 1 && no < mn){
        mn = no;
        cmask = mask;
      }
      else if(rez == (1LL << n) - 1 && no == mn && issmaller(mask, cmask)){
        cmask = mask;
      }
    }
    printf("%d\n", mn);
    for( i = 0; i < m; i++ ){
      if(cmask & (1 << i))
        printf("%d ", i + 1);
    }
    return 0;
}

Compilation message (stderr)

norela.cpp: In function 'int main()':
norela.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
norela.cpp:23:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |       scanf("%d", &q);
      |       ~~~~~^~~~~~~~~~
norela.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         scanf("%d", &bit);
      |         ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25