제출 #649619

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
649619		mychecksedad	Regions (IOI09_regions)	C++17	25 / 100	1002 ms	131072 KiB

regions

/* Author : Mychecksdead */
#include<bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef long double ld;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define setp() cout << setprecision(15)
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " is " << x << '\n';
const int N = 1e6+100, M = 1e5+10, F = 2147483646, K = 20;


int n, q, r, a[N], ans[1000][1000];
vector<int> g[N], R[N];

void dfs(int v, int p){
    R[v].resize(r + 5);
    for(int u: g[v]){
        if(u == p) continue;
        dfs(u, v);
        for(int j = 1; j <= r; ++j) R[v][j] += R[u][j];
    }
    for(int j = 1; j <= r; ++j) ans[a[v]][j] += R[v][j];
    R[v][a[v]]++;    
}

void solve(){
    cin >> n >> r >> q;
    cin >> a[1];
    for(int i = 2; i <= n; ++i){
        int x; cin >> x >> a[i];
        g[x].pb(i);
        g[i].pb(x);
    }
    for(int i = 0; i <= r; ++i) for(int j = 0; j <= r; ++j) ans[i][j] = 0;
    dfs(1, 1);
    for(;q--;){
        int a, b; cin >> a >> b;
        cout << ans[a][b] << endl;
    }
}





int main(){
    cin.tie(0); ios::sync_with_stdio(0);
    int T = 1, aa;
    // cin >> T;aa=T;
    while(T--){
        // cout << "Case #" << aa-T << ": ";
        solve();
        // cout << '\n';
    }
    return 0;
 
}

컴파일 시 표준 에러 (stderr) 메시지

regions.cpp: In function 'int main()':
regions.cpp:54:16: warning: unused variable 'aa' [-Wunused-variable]
   54 |     int T = 1, aa;
      |                ^~

• Subtask 1: 15 / 15
• Subtask 2: 10 / 85