Submission #942752

#	Time	Username	Problem	Language	Result	Execution time	Memory
942752		Lilypad	Lasers (NOI19_lasers)	C++14	10 / 100	17 ms	17096 KiB

lasers

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<ll,ll>
#define pb push_back
#define fi first
#define se second

const ll N = 5e5+5;

ll l,r,x,c;
vector<ll> a[N];

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> l >> r;
	for(int i=1; i<=r; i++) {
		cin >> x;
		for(int j=1; j<=x; j++) {
			cin >> c;
			a[i].pb(c);
		}
	}
	cout << max(0ll,2*c-l) << endl;
}

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