제출 #914242

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
914242	2024-01-21 12:22:12	VMaksimoski008	Regions (IOI09_regions)	C++14	100 / 100	2980 ms	27724 KiB

regions

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#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
 
using namespace std;
using pii = pair<int, int>;
 
const int maxn = 2e5 + 5;
 
int n, r, q, in[maxn], out[maxn], timer = 0, B = 500, curr = 0, dp[210][25005];
short home[maxn], id[maxn];
vector<vector<int> > graph;
vector<vector<pii> > by_home;
 
void dfs(int u) {
    in[u] = timer++;
 
    for(int &v : graph[u])
        dfs(v);
 
    out[u] = timer;
}
 
void dfs2(int u, int R, int cnt) {
    if(home[u] == R) cnt++;
    dp[id[R]][home[u]] += cnt;
    for(int &v : graph[u]) dfs2(v, R, cnt);
}
 
int32_t main() {
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 85 / 85