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답안 #834558

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
834558 2023-08-22T15:27:26 Z Ozy Designated Cities (JOI19_designated_cities) C++17
0 / 100
 3 ms 5028 KB 
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "

#define MAX 200000

struct x {
    lli des;
    lli w;
    lli comp;
};

lli n,a,b,c,d,raiz,op,total,q;
vector<x> hijos[MAX+2];
lli sub[MAX+2];

void pre_dfs(lli pos, lli padre) {
    for(auto h : hijos[pos]) {
        if(h.des == padre) continue;
        pre_dfs(h.des,pos);
        sub[pos] += sub[h.des] + (h.comp-h.des);
    }
}

void busca_raiz(lli pos, lli padre,lli carga) {

    lli a = carga + sub[pos];
    if (a > op){
        op = a;
        raiz = pos;
    }  

    for(auto h : hijos[pos]){
        if(h.des == padre) continue;
        a = carga + sub[pos] - sub[h.des];
        a -= (h.comp-h.w);
        a += h.w;
        busca_raiz(h.des,pos,a);
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    rep(i,1,n-1) {
        cin >> a >> b >> c >> d;
        hijos[a].push_back({b,c,c+d});
        hijos[b].push_back({a,d,c+d});
        total += (c+d);
    }

    pre_dfs(1,0);
    busca_raiz(1,0,0);

    cin >> q >> a;
    cout << (total-op);

    return 0;  
}

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5028 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5024 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 5028 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 4948 KB Output isn't correct
2 Halted 0 ms 0 KB -