제출 #1289440

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1289440		LIA	Fancy Fence (CEOI20_fancyfence)	C++17	0 / 100	1 ms	576 KiB

fancyfence

//
// Created by liasa on 10/11/2025.
//

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vll vector<ll>
const ll mod = 1e9 + 7;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ll n;
  cin >> n;
  vll h(n), w(n);
  ll H = 0, W = 0;
  for (ll i = 0; i < n; ++i)
    cin >> h[i];
  for (ll i = 0; i < n; ++i)
    cin >> w[i];
  for (ll i = 0; i < n; ++i) {
    H = max(H, h[i]);
    W += w[i];
  }

  H++, W++;
  // ll ans = 0;
  // for (ll x1 = 0; x1 < H; x1++) {
  //   for (ll x2 = x1 + 1; x2 < H; x2++) {
  //     for (ll y1 = 0; y1 < W; y1++) {
  //       for (ll y2 = y1 + 1; y2 < W; y2++) {
  //         // cout << x1 << " " << y1 << " " << x2 << " " << y2 << endl;
  //         ans++;
  //         ans%=mod;
  //       }
  //     }
  //   }
  // }
  ll ans = (H * (H - 1) / 2) % mod;
  ans = (ans * W * (W - 1) / 2) % mod;
  cout << ans;
}

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• Subtask 3: 0 / 13
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• Subtask 5: 0 / 15
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