제출 #257452

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
257452	2020-08-04 09:35:42	karma	Birthday gift (IZhO18_treearray)	C++14	100 / 100	1301 ms	83320 KiB

treearray

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#include <bits/stdc++.h>
#define pb          emplace_back
#define ll          long long
#define fi          first
#define se          second
#define mp          make_pair
//#define int         int64_t
using namespace std;
const int N = int(2e5) + 7;
const int logN = 18;
typedef pair<int, int> pii;
int n, m, q, a[N];
int p[N][logN + 1], d[N];
vector<int> adj[N];
void dfs(int u) {
    for(int i = 1; i <= logN; ++i) p[u][i] = p[p[u][i - 1]][i - 1];
    for(int v: adj[u]) {
        if(v == p[u][0]) continue;
        p[v][0] = u;
        d[v] = d[u] + 1;
        dfs(v);
    }
}
int lca(int u, int v) {
    if(d[u] < d[v]) swap(u, v);
 
 
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컴파일 시 표준 에러 (stderr) 메시지

treearray.cpp: In function 'int32_t main()':
treearray.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
treearray.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 26 / 26
• Subtask 4: 44 / 44