#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define fast ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#define MOD 998244353
#define INF 1e18
#define fi first
#define se second
#define endl "\n"
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORD(i,a,b) for(int i=a;i>=b;i--)
#define sz(a) ((int)(a).size())
#define pi 3.14159265359
#define TASKNAME "amusepark"
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }
using namespace std;
typedef pair<int,int> ii;
typedef pair<int,ii> iii;
typedef vector<int> vi;
const int MAXN = 3e2 + 9;
ii edge[MAXN];
int n,m,ans=0;
int pos[MAXN];
int prep[MAXN];
int N[MAXN];
void add(int &a,int b){
a += b;
if (a>=MOD) a-=MOD;
}
void sub(int &a,int b){
a -= b;
if (a < 0) a += MOD;
}
int dp[(1<<19)];
bool independent[(1<<19)];
int power(int a,int b){
int res = 1;
while(b>0){
if (b&1) res = (res * a) %MOD;
b>>=1;
a = (a * a) % MOD;
}
return res;
}
main()
{
fast;
// freopen(TASKNAME".inp","r",stdin);
// freopen(TASKNAME".out","w",stdout);
cin>>n>>m;
for(int i=1;i<=m;i++){
cin>>edge[i].fi>>edge[i].se;
// edge[i].fi--;
// edge[i].se--;
N[edge[i].se-1] |= (1<<(edge[i].fi-1));
N[edge[i].fi-1] |= (1<<(edge[i].se-1));
}
vector<int> bit;
for(int i=1;i<(1<<n);i++){
bit.clear();
for(int j=0;j<n;j++){
if (i&(1<<j)){
bit.pb(j);
}
}
independent[i] = true;
for(int j=0;j<bit.size();j++){
for(int k=0;k<bit.size();k++){
if (N[bit[j]] & (1<<bit[k])){
independent[i] = false;
}
}
}
}
dp[0] = 1;
for(int i=1;i<(1<<n);i++){
for(int j=i;j>0;j=(j-1)&i){
int numbit = __builtin_popcount(j);
if (independent[j]){
if (numbit & 1) add(dp[i],dp[i^j]);
else sub(dp[i],dp[i^j]);
}
}
cout<<dp[i]<<endl;
}
cout<<((dp[(1<<n)-1] * m)%MOD * power(2,MOD-2))%MOD<<endl;
}
Compilation message
amusementpark.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
46 | main()
| ^~~~
amusementpark.cpp: In function 'int main()':
amusementpark.cpp:68:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for(int j=0;j<bit.size();j++){
| ~^~~~~~~~~~~
amusementpark.cpp:69:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
69 | for(int k=0;k<bit.size();k++){
| ~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
