Submission #1275647

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275647		lioow	Lasers (NOI19_lasers)	C++20	24 / 100	191 ms	584 KiB

lasers

#include <bits/stdc++.h>
#define repp(i,x,n) for(int i=x;i<=n;i++)
using namespace std;
#define int long long

const int MAXN = 3e5+5;
const int mod = 1e9+7;

signed main () {
   int L,N;cin>>L>>N;
   int maks=0;
   repp(i,1,N){
    int x;cin>>x;
    int y;
    repp(j,1,x){
        cin>>y;
        maks=max(maks,y);
    }
   }
    cout<<max(0LL,maks*2-L)<<endl;
}

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