Submission #165406

#	Time	Username	Problem	Language	Result	Execution time	Memory
165406		Atill83	Geppetto (COCI15_geppetto)	C++14	80 / 80	86 ms	1260 KiB

geppetto

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 2e6+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n, m;

bool can[25][25];
bool dp[MAXN];

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("../IO/int.txt","r",stdin);
        freopen("../IO/out.txt","w",stdout);
    #endif

    cin>>n>>m;

    for(int i = 0; i < m; i++){
        int a, b;
        cin>>a>>b;
        can[a - 1][b -  1] = 1;
        can[b - 1][a - 1] = 1;
    }
    dp[0] = 1;
    int ans = 0;
    for(int i = 0; i < (1<<n); i++){
        int cikari = (i & -i);
        int yer = 0;
        int tmp = cikari;
        while(tmp){
            tmp /= 2;
            yer++;
        }
        yer--;
        bool cn = 1;
        for(int j = 0; j < n; j++){
            
            if(((1<<j) & i) == 0){
                continue;
            }
            if(can[j][yer]){
                cn = 0;
                break;
            }
        }
        //cout<<i<<" "<<(i^cikari)<<endl;
        if(cn == 0){
            continue;
        }
        else if(dp[i^cikari]){
            dp[i] = 1;
            //cout<<i<<endl;
            ans++;
        }
    }
    cout<<ans<<endl;
    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• Subtask 1: 80 / 80