Submission #1012755

#	Time	Username	Problem	Language	Result	Execution time	Memory
1012755		kebine	Lasers (NOI19_lasers)	C++17	24 / 100	101 ms	52940 KiB

lasers

#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
using namespace std;

int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);

  int n, q;
  cin >> n >> q;
  vector<int> k(q + 5);
  vector<vector<int>> b(q + 5);
  for (int i = 1; i <= q; ++i) {
    cin >> k[i];
    b[i].resize(k[i] + 5);
    for (int j = 1; j <= k[i]; ++j) {
      cin >> b[i][j];
    }
  }

  int ans = 0;
  for (int i = 1; i <= q; ++i) {
    int sum = 0;
    for (int j = 1; j <= k[i]; ++j) {
      sum += b[i][j];
    }
    ans = max(ans, sum + sum - n);
  }

  cout << ans << '\n';

  return 0;
}

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