제출 #1007894

#제출 시각아이디문제언어결과실행 시간메모리
1007894christinelynnLasers (NOI19_lasers)C++17
24 / 100
47 ms6064 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    int n, q; cin >> n >> q;

    int mx = -1e18;

    while ( q-- ){
        int temp; cin >> temp;
        if ( temp == 1 ){
            int yes; cin >> yes;
            mx =  max ( mx,  max ( 0ll, 2 * yes - n));
        }
    }

    cout << mx << endl;
}
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