제출 #824219

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
8242192023-08-13 19:07:42vjudge1Mergers (JOI19_mergers)C++17
100 / 100
900 ms233108 KiB
#include <bits/stdc++.h>
using namespace std;
// 123
static const int N = 1e6 + 10;
class lca_t {
public:
int rmq[20][N];
int pos[N], d[N];
vector<int> adj[N];
int timer;
int n;
lca_t(int n = 0) : n(n) {}
void add_edge(int u, int v) {
adj[u].emplace_back(v);
adj[v].emplace_back(u);
}
void dfs(int u, int p) {
rmq[0][timer++] = u;
for (int v : adj[u]) {
if (v == p) continue;
d[v] = d[u] + 1;
dfs(v, u);
rmq[0][timer++] = u;
}
}
 
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컴파일 시 표준 에러 (stderr) 메시지

mergers.cpp: In function 'int32_t main()':
mergers.cpp:141:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  141 |         cout << (res + 1 >> 1);
      |                  ~~~~^~~
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