Submission #2978894


Source Code Expand

#include<bits/stdc++.h>
using namespace std;

//#define int long long 
#define put(n) cout<<(n)<<"\n"
#define FOR(i,num,N) for(int(i)=(num);(i)<(N);(i)++)
#define RFOR(i,num,N) for(int (i)=(num);(i)>(N);(i)--)
#define all(v) (v).begin() , (v).end()
#define rall(v) (v).rbegin() , (v).rend()

int N,M;
vector<int> U,V;
vector<bool> reached;
int ans = 0;

bool dfs(int x,int y){
    if(reached[x]) return false;
    reached[x] = true;
    FOR(i,0,M){
        if(U[i] == x && V[i] != y && !dfs(V[i],x)) return false;
        if(V[i] == x && U[i] != y && !dfs(U[i],x)) return false;       
    }
    return true;
}

signed main(){
    cin>>N>>M;
    U.resize(M);
    V.resize(M);
    reached.assign(N+1,false);

    FOR(i,0,M){
       cin>>U[i]>>V[i];
    }

    FOR(i,1,N+1){
        if(!reached[i] && dfs(i,0)) ++ans;
    }
    put(ans);
}

Submission Info

Submission Time
Task B - バウムテスト
User ugis
Language C++14 (GCC 5.4.1)
Score 100
Code Size 876 Byte
Status AC
Exec Time 3 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 3
AC × 34
Set Name Test Cases
Sample subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt
All subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask1_20.txt, subtask1_21.txt, subtask1_22.txt, subtask1_23.txt, subtask1_24.txt, subtask1_25.txt, subtask1_26.txt, subtask1_27.txt, subtask1_28.txt, subtask1_29.txt, subtask1_30.txt, subtask1_31.txt
Case Name Status Exec Time Memory
subtask0_sample_01.txt AC 1 ms 256 KB
subtask0_sample_02.txt AC 1 ms 256 KB
subtask0_sample_03.txt AC 1 ms 256 KB
subtask1_01.txt AC 1 ms 256 KB
subtask1_02.txt AC 1 ms 256 KB
subtask1_03.txt AC 1 ms 256 KB
subtask1_04.txt AC 1 ms 256 KB
subtask1_05.txt AC 1 ms 256 KB
subtask1_06.txt AC 1 ms 256 KB
subtask1_07.txt AC 1 ms 256 KB
subtask1_08.txt AC 1 ms 256 KB
subtask1_09.txt AC 1 ms 256 KB
subtask1_10.txt AC 1 ms 256 KB
subtask1_11.txt AC 1 ms 256 KB
subtask1_12.txt AC 1 ms 256 KB
subtask1_13.txt AC 1 ms 256 KB
subtask1_14.txt AC 1 ms 256 KB
subtask1_15.txt AC 1 ms 256 KB
subtask1_16.txt AC 1 ms 256 KB
subtask1_17.txt AC 1 ms 256 KB
subtask1_18.txt AC 1 ms 256 KB
subtask1_19.txt AC 1 ms 256 KB
subtask1_20.txt AC 1 ms 256 KB
subtask1_21.txt AC 1 ms 256 KB
subtask1_22.txt AC 1 ms 256 KB
subtask1_23.txt AC 1 ms 256 KB
subtask1_24.txt AC 1 ms 256 KB
subtask1_25.txt AC 1 ms 256 KB
subtask1_26.txt AC 1 ms 256 KB
subtask1_27.txt AC 1 ms 256 KB
subtask1_28.txt AC 1 ms 256 KB
subtask1_29.txt AC 3 ms 256 KB
subtask1_30.txt AC 3 ms 256 KB
subtask1_31.txt AC 1 ms 256 KB