제출 #1309032

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1309032		lyra_g13	Lasers (NOI19_lasers)	C++20	0 / 100	1096 ms	4560 KiB

lasers

#include <bits/stdc++.h>
using ll = long long;
using namespace std;

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

  ll l, r;
  cin >> l >> r;

  vector<vector<ll>> a(r);

  for (int i = 0; i < r; i++) {
    ll x;
    cin >> x;

    for (int j = 0; j < x; j++) {
      ll u;
      cin >> u;
      a[i].push_back(u);
    }
  }

  ll count = 0;
  for (int i = 0; i < l; i++) {
    ll countif = 0;
    for (int row = 0; row < r; row++) {
      ll cur = 0;
      ll curback = 0;
      ll right = 0;
      for (int j = 0; j < a[row].size(); j++) {
        if (right == 1) {
          curback += a[row][j];
        } else if (right == 0 and cur + a[row][j] < i) {
          cur += a[row][j];
        } else {
          right = 1;
          curback += a[row][j];
        }
      }
      if (!(cur < i and curback < l - i - 1)) {
        countif++;
      }
    }
    if (countif != r) {
      count++;
    }
  }

  cout << count << "\n";
}

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