結果
| 問題 | No.2563 色ごとのグループ |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-12-02 15:28:46 |
| 言語 | C++17 (gcc 15.2.0 + boost 1.90.0) |
| 結果 |
AC
|
| 実行時間 | 296 ms / 2,000 ms |
| コード長 | 1,279 bytes |
| 記録 | |
| コンパイル時間 | 3,163 ms |
| コンパイル使用メモリ | 284,340 KB |
| 実行使用メモリ | 33,536 KB |
| 最終ジャッジ日時 | 2026-07-03 03:25:28 |
| 合計ジャッジ時間 | 6,676 ms |
|
ジャッジサーバーID (参考情報) |
judge2_0 / judge1_0 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 35 |
コンパイルメッセージ
main.cpp: In function 'int main()':
main.cpp:14:36: 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]
14 | 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 main() {
ios::sync_with_stdio(0);cin.tie();
int N, M;
cin >> N >> M;
vector<int> C(N);
for (int i = 0; i < N; i++) {cin >> C[i]; C[i]--;}
vector<vector<int>> G(N);
for (int i = 0; i < M; i++) {
int u, v;
cin >> u >> v;
u--; v--;
if (C[u] != C[v]) continue;
G[u].push_back(v);
G[v].push_back(u);
}
vector<bool> visited(N);
vector<set<int>> S(N);
for (int i = 0; i < N; i++) S[C[i]].insert(i);
ll ans = 0;
for (int i = 0; i < N; i++) {
if (visited[i]) continue;
queue<int> que;
que.push(i);
while (que.size()) {
int v = que.front();
que.pop();
S[C[v]].erase(v);
visited[v] = true;
for (auto &nv : G[v]) {
if (!visited[nv]) que.push(nv);
}
if (que.size() == 0 && S[C[v]].size() > 0) {
que.push(*S[C[v]].begin());
ans++;
}
}
}
cout << ans << endl;
}