#include<bits/stdc++.h>
using namespace std;
#define pii pair<int, int>
#define ff first
#define ss second
#define pb push_back
int mod = 996244353;
int q[100][100], pos[100], n, m;
bool dfs(int v, int p){
pos[v] = 1;
int ok = 0;
for(int i=1; i<=n; i++){
if(i == v) continue;
if(i == p) continue;
if(!q[v][i]) continue;
if(pos[i] == 1){
return 1;
}
if(pos[i] == 2){
continue;
}
ok |= dfs(i, v);
if(ok){
return 1;
}
}
pos[v] = 2;
return ok;
}
void solve(){
cin>>n>>m;
vector<pii> d;
for(int i=1; i<=m; i++){
int l, r;
cin>>l>>r;
d.pb({l, r});
q[l][r] = 1;
}
int ans = 0;
for(int k=0; k<(1 << m); k++){
for(int i=0; i<n; i++){
if((k & (1 << i))){
q[d[i].ff][d[i].ss] = 0;
q[d[i].ss][d[i].ff] = 1;
}
else{
q[d[i].ff][d[i].ss] = 1;
q[d[i].ss][d[i].ff] = 0;
}
pos[i + 1] = 0;
}
int ok = 0;
for(int i=1; i<=n; i++){
if(!pos[i]){
ok |= dfs(i, 0);
if(ok){
break;
}
}
}
if(!ok){
for(int i=0; i<n; i++){
if((k & (1 << i))) ans = (ans + 1) % mod;
}
}
}
cout<<ans;
}
int main(){
solve();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |