Submission #743269

#	Time	Username	Problem	Language	Result	Execution time	Memory
743269		vjudge1	Lasers (NOI19_lasers)	C++17	24 / 100	87 ms	3728 KiB

lasers

#include<bits/stdc++.h>

using namespace std;

using ll = long long ;

ll n , m , cnt , ans ;
ll l , r ;
ll mnL = 1e18 , mxR = -1e18 ;

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

    cin >> l >> r ;

    for(int i=1;i<=r;i++){
        ll x , y ; cin >> x >> y ;

        ll st = l - y + 1 , ed = y ;
        if(st > ed) continue ;
        mnL = min(st , mnL) , mxR = max(ed , mxR) ;
    }
    if(mnL == 1e18 || mxR == -1e18){
        cout << "0" ;
    }
    else cout << mxR - mnL + 1 ;
}

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 13