#include <bits/stdc++.h>
using namespace std;
const int mx = 1e5+5;
typedef long long ll;
typedef unsigned int ui;
typedef unsigned long long ull;
typedef pair<int,int>pii;
typedef pair<int,pii>piii;
#define sf scanf
#define pf printf
#define input freopen("input.txt","r",stdin)
#define output freopen("output.txt","w",stdout)
#define inf 1e16
#define ff first
#define ss second
#define MP make_pair
#define pb push_back
#define all(v) v.begin(), v.end()
#define printcase(cases) printf("Case %d:", cases);
#define Unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define FAST ios_base::sync_with_stdio(0);cout.tie(0)
#define endl printf("\n")
#define __lcm(a, b) ((a*b)/__gcd(a, b))
int Set(int N,int pos){return N=N | (1<<pos);}
int reset(int N,int pos){return N= N & ~(1<<pos);}
bool check(int N,int pos){return (bool)(N & (1<<pos));}
vector<int>v[30];
int main()
{
int n, m;
sf("%d%d", &n, &m);
for(int i = 0; i < m; i++)
{
int a, b;
sf("%d%d", &a, &b);
v[a].push_back(b);
v[b].push_back(a);
}
int ans = 1<<n;
for(int b = 0; b < (1<<n); b++)
{
vector<int>subset;
for(int i = 0; i < n; i++)
if(b&(1<<i)) subset.push_back(i+1);
for(int i = 0; i < subset.size(); i++)
{
int flag = 0;
for(int r = 0; r < subset.size(); r++)
{
if(i==r) continue;
if(find(v[subset[i]].begin(), v[subset[i]].begin(), subset[r])!=v[subset[i]].end())
{
ans--;
flag = 1;
break;
}
}
if(flag) break;
}
}
pf("%d\n", ans);
return 0;
}
Compilation message
geppetto.cpp: In function 'int main()':
geppetto.cpp:54:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0; i < subset.size(); i++)
~~^~~~~~~~~~~~~~~
geppetto.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int r = 0; r < subset.size(); r++)
~~^~~~~~~~~~~~~~~
geppetto.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
sf("%d%d", &n, &m);
^
geppetto.cpp:44:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
sf("%d%d", &a, &b);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
504 KB |
Output isn't correct |
| 3 |
Incorrect |
284 ms |
504 KB |
Output isn't correct |
| 4 |
Incorrect |
280 ms |
620 KB |
Output isn't correct |
| 5 |
Incorrect |
285 ms |
620 KB |
Output isn't correct |
| 6 |
Incorrect |
287 ms |
620 KB |
Output isn't correct |
| 7 |
Incorrect |
289 ms |
620 KB |
Output isn't correct |
| 8 |
Incorrect |
289 ms |
620 KB |
Output isn't correct |
| 9 |
Incorrect |
302 ms |
692 KB |
Output isn't correct |
| 10 |
Incorrect |
332 ms |
692 KB |
Output isn't correct |
