結果
| 問題 | No.2561 みんな大好きmod 998 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-12-02 14:54:02 |
| 言語 | C++17 (gcc 15.2.0 + boost 1.90.0) |
| 結果 |
AC
|
| 実行時間 | 30 ms / 4,000 ms |
| コード長 | 969 bytes |
| 記録 | |
| コンパイル時間 | 3,051 ms |
| コンパイル使用メモリ | 273,416 KB |
| 実行使用メモリ | 6,528 KB |
| 最終ジャッジ日時 | 2026-07-03 03:12:23 |
| 合計ジャッジ時間 | 4,764 ms |
|
ジャッジサーバーID (参考情報) |
judge2_0 / judge1_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 44 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:35:36: warning: ignoring return value of 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie() const [with _CharT = char; _Traits = std::char_traits<char>]', declared with attribute 'nodiscard' [-Wunused-result]
35 | ios::sync_with_stdio(0);cin.tie();
| ~~~~~~~^~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/ios:48,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/istream:42,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/sstream:42,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/complex:50,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/x86_64-pc-linux-gnu/bits/stdc++.h:141,
from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/basic_ios.h:310:7: note: declared here
310 | tie() const
| ^~~
ソースコード
#include <bits/stdc++.h>
#include <atcoder/all>
using ll = long long;
#define MOD 1000000007
#define Mod 998244353
const int MAX = 1000000005;
const long long INF = 1000000000000000005LL;
using namespace std;
using namespace atcoder;
int N, K, ans = 0;
void dfs(vector<int> &X, vector<int> &A) {
if (X.size() == K) {
ll S = 0;
for (int i = 0; i < K; i++) S += A[X[i]];
if (S % Mod <= S % 998) ans++;
return;
}
if (X.size() == 0) {
for (int i = 0; i < N; i++) {
X.push_back(i);
dfs(X, A);
X.pop_back();
}
} else {
for (int i = X[X.size() - 1]+1; i < N; i++) {
X.push_back(i);
dfs(X, A);
X.pop_back();
}
}
}
int main() {
ios::sync_with_stdio(0);cin.tie();
cin >> N >> K;
vector<int> A(N);
for (int i = 0; i < N; i++) cin >> A[i];
vector<int> X;
dfs(X, A);
cout << ans % 998 << endl;
}