結果
問題 | No.2240 WAC |
ユーザー |
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提出日時 | 2023-03-10 23:11:11 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 14 ms / 2,000 ms |
コード長 | 1,071 bytes |
コンパイル時間 | 4,426 ms |
コンパイル使用メモリ | 252,672 KB |
最終ジャッジ日時 | 2025-02-11 09:12:26 |
ジャッジサーバーID (参考情報) |
judge1 / judge1 |
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ファイルパターン | 結果 |
---|---|
other | AC * 43 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:47:25: warning: ignoring return value of ‘std::vector<bool, _Alloc>::reference std::vector<bool, _Alloc>::operator[](size_type) [with _Alloc = std::allocator<bool>; reference = std::vector<bool>::reference; size_type = long unsigned int]’, declared with attribute ‘nodiscard’ [-Wunused-result] 47 | used[posa.back()]; | ^ In file included from /usr/include/c++/13/vector:67, from /usr/include/c++/13/functional:64, from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:53, from main.cpp:1: /usr/include/c++/13/bits/stl_bvector.h:1086:7: note: declared here 1086 | operator[](size_type __n) | ^~~~~~~~
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> #define elif else if #define ll long long #define vll vector<long long> #define vec vector #define embk emplace_back #define rep(i, n) for (int i = 0; i < n; i++) #define rep3(i, n, k) for (int i = k; i < n; i++) #define all(a) a.begin(), a.end() using namespace std; using namespace atcoder; const ll INF = 1LL << 60; const ll mod = 998244353; int main() { ll n, m; cin >> n >> m; string s; cin >> s; ll ss = s.size(); vec<bool> used(ss); deque<ll> posa; ll count = 0; rep(i, ss) { if (s[ss-i-1] == 'A') { count++; posa.push_back(ss-i-1); } elif (s[ss-i-1] == 'W') { count--; if (count < 0) { cout << "No" << endl; return 0; } used[posa.front()] = 1; posa.pop_front(); } } rep(i, ss) { if (s[i] == 'C') { if (posa.back() < i) { used[posa.back()]; posa.pop_back(); } else { cout << "No" << endl; return 0; } } } cout << "Yes" << endl; }