Submission #515986

#	Time	Username	Problem	Language	Result	Execution time	Memory
515986		Joo	City Mapping (NOI18_citymapping)	C++17	13 / 100	2 ms	460 KiB

citymapping

#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;

void find_roads(int N, int Q, int A[], int B[], int W[]) {
	int leaf = 0;
	long long mx = 0;
	for(int i = 2; i <= N; i++){
		long long res = get_distance(1, i);
		if(res > mx){
			mx = res;
			leaf = i;
		}
	}

	vector<pair<int, int>> vec;
	for(int i = 1; i <= N; i++){
		long long res = get_distance(leaf, i);
		vec.emplace_back(res, i);
	}
	sort(vec.begin(), vec.end());

	for(int i = 0; i+1 < vec.size(); i++){
		A[i] = vec[i].second;
		B[i] = vec[i+1].second;
		W[i] = vec[i+1].first-vec[i].first;
	}

	return;
}

Compilation message (stderr)

citymapping.cpp: In function 'void find_roads(int, int, int*, int*, int*)':
citymapping.cpp:23:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i = 0; i+1 < vec.size(); i++){
      |                 ~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 13 / 13
• Subtask 4: 0 / 19
• Subtask 5: 0 / 43