Submission #321499

#	Time	Username	Problem	Language	Result	Execution time	Memory
321499		egas	Lasers (NOI19_lasers)	C++14	24 / 100	104 ms	1516 KiB

lasers

#include <bits/stdc++.h>

using namespace std;

int32_t main() {

    ios_base::sync_with_stdio(false);

    cin.tie(0);

    long long l;

    cin >> l;

    long long r;

    cin >> r;

    long long res=0;

    for(long long i = 0 ; i < r ; i++) {

        long long x;

        cin >> x;

        vector<long long> a(x);

        for(long long i = 0 ; i < x ; i++) {

            cin >> a[i];

        }

        long long sum=accumulate(a.begin(),a.end(),0LL);

        long long cur=0;

        for(long long j = 0 ; j < a.size() ; j++) {

            long long meat=a[j];

            long long dem=l-(sum-a[j]);

            if(meat>=(dem/2)) {

                long double temp = meat - (dem/2.0);

                cur+=(long long)(temp/0.5);

            }

        }

        res=max(res,cur);

    }

    cout << res << '\n';

    return 0;

}

Compilation message (stderr)

lasers.cpp: In function 'int32_t main()':
lasers.cpp:39:33: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(long long j = 0 ; j < a.size() ; j++) {
      |                               ~~^~~~~~~~~~

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