Submission #931905

#	Time	Username	Problem	Language	Result	Execution time	Memory
931905		hugsfromadicto	Geppetto (COCI15_geppetto)	C++14	80 / 80	466 ms	8648 KiB

geppetto

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int mxN = 1e6+1;
int a[mxN], b[mxN];
int s[mxN];
void _()
{
    int n;
    cin >> n;
    int k = (1<<n);
    int b = k;
    int m;
    cin >> m;
    int cnt = 0;
    for(int i = 0; i < m; ++i)
    {
        int x,y;
        cin >> x >> y;
        for(int i = 0; i < k; ++i)
        {
                if(i & (1 << (x - 1)) and i & (1 << (y - 1)))
                {
                    if(!s[i])
                        cnt++;
                    s[i]++;
                }
        }
    }
    cout << k - cnt;
}

main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  int tc = 1;
  while(tc--)
  {
      _();
  }

}

Compilation message (stderr)

geppetto.cpp: In function 'void _()':
geppetto.cpp:13:9: warning: unused variable 'b' [-Wunused-variable]
   13 |     int b = k;
      |         ^
geppetto.cpp: At global scope:
geppetto.cpp:34:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   34 | main()
      | ^~~~

• Subtask 1: 80 / 80