Submission #1126428

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1126428	2024-12-13 07:16:39	TAhmed33	Building 4 (JOI20_building4)	C++20	0 / 100	2 ms	576 KiB

building4

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#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("Ofast")
typedef long long ll;
typedef long double ld;
const int MAXN = 1e6 + 25;
int a[MAXN][2], n, ans[MAXN];
pair <int, int> f[MAXN][2];
void construct (int pos, int x, int c) {
  ans[pos] = c; x -= c == 0;
  if (pos == 1) {
    return;
  }
  if (a[pos][c] >= a[pos - 1][0] && f[pos - 1][0].first <= x && x <= f[pos - 1][0].second) {
    construct(pos - 1, x, 0);
  } else if (a[pos][c] >= a[pos - 1][1] && f[pos - 1][1].first <= x && x <= f[pos - 1][1].second) {
    construct(pos - 1, x, 1);
  } else {
    assert(0);
  }
}
void solve () {
  cin >> n;
  n *= 2;
  for (int i = 1; i <= n; i++) {
    cin >> a[i][0];
  }
  for (int i = 1; i <= n; i++) {
    cin >> a[i][1];
  }
 
 
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Compilation message (stderr)

building4.cpp: In function 'int main()':
building4.cpp:79:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |                 freopen("input_file", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
building4.cpp:80:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |                 freopen("output_file", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 89