Submission #1000667

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1000667	2024-06-18 06:48:31	42kangaroo	Building 4 (JOI20_building4)	C++17	100 / 100	194 ms	47236 KiB

building4

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//
// Created by 42kangaroo on 18/06/2024.
//
#include "bits/stdc++.h"
using namespace std;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int n;
  cin >> n;
  array<vector<int>, 2> a;
  a.fill(vector<int>(2 * n));
  array<vector<pair<int, int>>, 2> dp;
  dp.fill(vector<pair<int, int>>(2 * n, {1e9, 0}));
  for (int i = 0; i < 2 * n; ++i) {
    cin >> a[0][i];
  }
  for (int i = 0; i < 2 * n; ++i) {
    cin >> a[1][i];
  }
  dp[0][0] = {0, 0};
  dp[1][0] = {1, 1};
  for (int i = 1; i < 2 * n; ++i) {
    for (int j = 0; j < 2; ++j) {
      for (int k = 0; k < 2; ++k) {
        if (a[j][i - 1] <= a[k][i]) {
          dp[k][i] = {min(dp[k][i].first, dp[j][i - 1].first + k),
                      max(dp[k][i].second, dp[j][i - 1].second + k)};
 
 
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Compilation message (stderr)

building4.cpp: In function 'int main()':
building4.cpp:50:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |  while (ans.size() < 2 * n) {
      |         ~~~~~~~~~~~^~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 89 / 89