Submission #44259389

Source Code Expand

#include <iostream>
#include <vector>
#include <string>
#include <math.h>
#include <cmath>
#include <iomanip>
#include <cstdio>
#include <algorithm>
#include <numeric>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <deque>
#include <bitset>
#include <cstring>
#include <unordered_map>

using namespace std;
typedef long long ll;



int main(){
    ll n, m;
    cin >> n >> m;
    
    vector<ll>a(n + 1);
    for(int i = 0; i < m; i++){
        ll b, c;
        cin >> b >> c;
        
        a[c]++;
    }
    
    ll pos = 0, ok = 0;
    
    for(int i = 1; i <= n; i++){
        if(a[i] == 0){
            pos = i;
            ok++;
        }
    }
    if(ok == 1)
        cout << pos << endl;
    else
        cout << -1 << endl;
    
    return 0;
}

Submission Info

Submission Time
Task B - Who is Saikyo?
User Ksusha
Language C++ (GCC 9.2.1)
Score 300
Code Size 832 Byte
Status AC
Exec Time 8 ms
Memory 3620 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 26
Set Name Test Cases
Sample 00_sample_00.txt, 00_sample_01.txt, 00_sample_02.txt
All 00_sample_00.txt, 00_sample_01.txt, 00_sample_02.txt, 01_random_00.txt, 01_random_01.txt, 01_random_02.txt, 01_random_03.txt, 01_random_04.txt, 01_random_05.txt, 01_random_06.txt, 01_random_07.txt, 01_random_08.txt, 01_random_09.txt, 01_random_10.txt, 01_random_11.txt, 01_random_12.txt, 01_random_13.txt, 01_random_14.txt, 01_random_15.txt, 01_random_16.txt, 02_min_00.txt, 02_min_01.txt, 02_min_02.txt, 03_corner_00.txt, 03_corner_01.txt, 03_corner_02.txt
Case Name Status Exec Time Memory
00_sample_00.txt AC 8 ms 3532 KiB
00_sample_01.txt AC 3 ms 3536 KiB
00_sample_02.txt AC 2 ms 3600 KiB
01_random_00.txt AC 5 ms 3412 KiB
01_random_01.txt AC 2 ms 3416 KiB
01_random_02.txt AC 2 ms 3600 KiB
01_random_03.txt AC 2 ms 3532 KiB
01_random_04.txt AC 4 ms 3492 KiB
01_random_05.txt AC 2 ms 3620 KiB
01_random_06.txt AC 2 ms 3528 KiB
01_random_07.txt AC 2 ms 3528 KiB
01_random_08.txt AC 2 ms 3420 KiB
01_random_09.txt AC 2 ms 3496 KiB
01_random_10.txt AC 3 ms 3492 KiB
01_random_11.txt AC 2 ms 3500 KiB
01_random_12.txt AC 2 ms 3496 KiB
01_random_13.txt AC 4 ms 3488 KiB
01_random_14.txt AC 2 ms 3552 KiB
01_random_15.txt AC 2 ms 3416 KiB
01_random_16.txt AC 2 ms 3600 KiB
02_min_00.txt AC 2 ms 3416 KiB
02_min_01.txt AC 2 ms 3488 KiB
02_min_02.txt AC 2 ms 3488 KiB
03_corner_00.txt AC 2 ms 3488 KiB
03_corner_01.txt AC 2 ms 3484 KiB
03_corner_02.txt AC 2 ms 3600 KiB