제출 #269548

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
269548		mayhoubsaleh	Geppetto (COCI15_geppetto)	C++14	80 / 80	6 ms	2688 KiB

geppetto

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define left 2*i+1
#define righ 2*i+2
#define mid (l+r)/2
#define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);


using namespace std;
const int maxn=1e5+100;
const int inf=1e9+10;
const int mod=1e4+7;

int n,m;
vector<int>v[maxn];
int pro[maxn];
int solve(int id){
    if(id==n)return 1;
    if(pro[id])return solve(id+1);
    int ret=solve(id+1);
    for(auto x:v[id]){
        pro[x]++;
    }
    ret+=solve(id+1);
    for(auto x:v[id])pro[x]--;
    return ret;
}


int main()
{
    IOS
    cin>>n>>m;
    for(int i=0;i<m;i++){
        int x,y;
        cin>>x>>y;
        x--;y--;
        v[x].pb(y);
        v[y].pb(x);
    }

    cout<<solve(0)<<endl;
    return 0;
}

• Subtask 1: 80 / 80