Submission #976288

#	Time	Username	Problem	Language	Result	Execution time	Memory
976288		saayan007	Factories (JOI14_factories)	C++17	0 / 100	16 ms	31068 KiB

factories

#include "factories.h"
#include "bits/stdc++.h"
using namespace std;

const char nl = '\n';

/* #warning checkconstanst as per subtask */
using ll = long long;
const int mxN = 5e5L + 10;

vector<pair<int, ll>> adj[mxN];
ll dist[mxN];
queue<int> q;
int n;

/* void Init(int N, int A[], int B[], int D[]) { */
void Init(signed N, signed A[], signed B[], signed D[]) {
    n = N;
    for(int i = 0; i < N - 1; ++i) {
        adj[A[i]].emplace_back(B[i], D[i]);
        adj[B[i]].emplace_back(A[i], D[i]);
    }
    for(int i = 0; i < N; ++i) {
        dist[i] = -1;
    }
}

/* long long Query(int S, int X[], int T, int Y[]) { */
long long Query(signed S, signed X[], signed T, signed Y[]) {
    /* for(int y : Y) { */
    for(int i = 0; i < T; ++i) {
        dist[Y[i]] = 0;
        q.push(Y[i]);
    }
    
    while(!q.empty()) {
        int a = q.front();
        q.pop();
        for(auto tmp : adj[a]) {
            int b = tmp.first; ll w = tmp.second;
            if(dist[b] != -1) continue;
            dist[b] = dist[a] + w;
            q.push(b);
        }
    }

    ll res = -1;
    for(int i = 0; i < S; ++i) {
        if(dist[X[i]] != -1 && (res == - 1 || dist[X[i]] < res)) res = dist[X[i]];
    }

    for(int i = 0; i < n; ++i) dist[i] = -1;

    return res;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 18
• Subtask 3: 0 / 67