제출 #935035

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
935035		anton	꿈 (IOI13_dreaming)	C++17	0 / 100	24 ms	12100 KiB

dreaming

#include "dreaming.h"
#include<bits/stdc++.h>

using namespace std;
#define int long long
#define pii pair<int, int>


struct Tree{
    vector<vector<pii>> adj;
    vector<int> longest;
    int min_len = 1e9;
};
vector<vector<pii>> adj;
vector<bool> vis;
vector<Tree> forest;


Tree sTree;

void get_tree(int id, int anc){
    //cout<<id<<endl;
    vis[id] = true;
    int tree_id = sTree.adj.size();
    sTree.adj.push_back(vector<pii>(0));
    for(auto e: adj[id]){
        if(e.first!=anc){
            int future_id = sTree.adj.size();
            get_tree(e.first, id);
            sTree.adj[tree_id].push_back(pii(future_id, e.second));
            sTree.adj[future_id].push_back(pii(tree_id, e.second));
        }
    }
    //cout<<id<<" done "<<endl;
}

int get_len(int id, int anc, Tree& tr){
    int ans = 0;

    for(auto e: tr.adj[id]){
        if(e.first!=anc){
            ans = max(ans, get_len(e.first, id, tr)+1);
        }
    }
    return ans;
}

signed travelTime(signed N,signed M, signed L,signed A[], signed B[], signed T[]) {
    adj.resize(N);
    vis.resize(N);
    for(int i =0; i<M; i++){
        adj[A[i]-1].push_back(pii(B[i]-1, T[i]));
        adj[B[i]-1].push_back(pii(A[i]-1, T[i]));
    }
    for(int i = 0; i<N; i++){
        
        if(!vis[i]){
            //cerr<<i<<endl;
            sTree.adj.clear();
            get_tree(i, -1);
            forest.push_back(sTree);
        }
    }

    
    for(int j = 0; j<forest.size(); j++){
        forest[j].longest.resize(forest[j].adj.size());
    
        for(int i = 0; i<forest[j].adj.size(); i++){
            forest[j].longest[i] = get_len(i, -1, forest[j]);
            forest[j].min_len= min(forest[j].min_len, forest[j].longest[i]);
        }
    }

    return forest[0].min_len + forest[1].min_len + L;
}

컴파일 시 표준 에러 (stderr) 메시지

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:66:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<Tree>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for(int j = 0; j<forest.size(); j++){
      |                    ~^~~~~~~~~~~~~~
dreaming.cpp:69:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |         for(int i = 0; i<forest[j].adj.size(); i++){
      |                        ~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23