Submission #1249241

#TimeUsernameProblemLanguageResultExecution timeMemory
1249241Bui_Quoc_CuongGift Exchange (JOI24_ho_t4)C++20
0 / 100
2593 ms3852 KiB
#include <bits/stdc++.h> using namespace std; // #define int long long using ll = long long; const int maxN = 5e5 + 5; int n, q; int a[maxN], b[maxN]; void init () { cin >> n; for (int i = 1; i <= n; i++) { cin >> a[i]; } for (int i = 1; i <= n; i++) { cin >> b[i]; } cin >> q; } namespace sub1 { void solve() { while (q--) { int l, r; cin >> l >> r; vector <array <int, 2>> sortedA, sortedB; for (int i = l; i <= r; i++) { sortedA.push_back({a[i], i}); sortedB.push_back({b[i], i}); } sort(sortedA.begin(), sortedA.end()); sort(sortedB.begin(), sortedB.end()); set <int> se; bool ans = 1; int _j = 0; for (int _i = 0; _i < (int)sortedA.size(); _i++) { while (_j < (int)sortedB.size() && sortedB[_j][0] <= sortedA[_i][0]) { se.insert(sortedB[_j][1]); _j++; } if (se.empty()) { ans = 0; break; } auto it = se.rbegin(); if (*it == sortedA[_i][1]) { if (se.size() < 2) { ans = 0; break; } else { auto it = se.end(); it--; it--; se.erase(*it); } } else { se.erase(*it); } } cout << (ans ? "Yes" : "No") << "\n"; } } } void process () { return sub1 :: solve(); } signed main () { ios_base :: sync_with_stdio(0); cin.tie(0); #define taskname "JOI24_ho_t4" if (fopen(taskname".inp", "r")) { freopen(taskname".inp", "r", stdin); freopen(taskname".out", "w", stdout); } init(); process(); return 0; }

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:80:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:81:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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