제출 #1128683

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1128683		rayan_bd	Regions (IOI09_regions)	C++20	0 / 100	179 ms	196608 KiB

regions

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define all(x) x.begin(),x.end()

const int mxN = 2e5+5000;

void io(){
/*    #ifndef ONLINE_JUDGE
    freopen("input.in","r",stdin);
    freopen("output.out","w",stdout);
    #endif*/

    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}


vector<int> adj[mxN];
int region[mxN],dp[mxN][505],answers[505][505];

void dfs(int u){
	for(auto it:adj[u]){
		dfs(it);
		for(int i=0;i<=500;++i){
			dp[u][i]+=dp[it][i];
		}
		++dp[u][region[it]];
	}
}


int main(){
	io();
	
	int n,r,q,u,man,reg;cin>>n>>r>>q;
	cin>>region[1];

	for(int i=2;i<=n;++i){
		cin>>u>>region[i];
		adj[u].pb(i);
	}

	memset(dp,0,sizeof(dp));
	dfs(1);

	for(int i=1;i<=n;++i){
		for(int j=1;j<=r;++j){
			answers[region[i]][j]+=dp[i][j];
		}
	}

	while(q--){
		cin>>man>>reg;
		cout<<answers[man][reg]<<endl;
	}

	return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 85