제출 #1109731

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1109731		Trisanu_Das	트리 (IOI24_tree)	C++17	7 / 100	56 ms	10040 KiB

tree

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
 
const int MAX_NODES = 300005;
 
int n, child_count[MAX_NODES], leaf_count;
vector<int> parent, weight;
 
void init(const vector<int> _parent, const vector<int> _weight) {
    parent = _parent;
    weight = _weight;
    n = parent.size();
    fill(child_count, child_count + n, 0);
    leaf_count = 0;
    for (int i = 1; i < n; i++) child_count[parent[i]]++;
    for (int i = 0; i < n; i++) if (child_count[i] == 0) leaf_count++;
}
 
ll query(int left, int right) {
    return leaf_count * (ll)left + max(0LL, leaf_count * (ll)left - right);
}

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