제출 #118423

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
118423		E869120	이상적인 도시 (IOI12_city)	C++14	32 / 100	118 ms	1376 KiB

city

#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
using namespace std;

vector<int>vec[2009]; int dist[2009];

int DistanceSum(int N, int *X, int *Y) {
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			if (abs(X[i] - X[j]) + abs(Y[i] - Y[j]) == 1) {
				vec[i].push_back(j);
			}
		}
	}

	long long sum = 0;
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) dist[j] = (1 << 30);
		queue<int>Q; Q.push(i); dist[i] = 0;
		while (!Q.empty()) {
			int pos = Q.front(); Q.pop();
			for (int j = 0; j < vec[pos].size(); j++) {
				if (dist[vec[pos][j]] > dist[pos] + 1) {
					dist[vec[pos][j]] = dist[pos] + 1;
					Q.push(vec[pos][j]);
				}
			}
		}
		for (int j = 0; j < N; j++) sum += dist[j];
	}
	return (int)((sum / 2LL) % 1000000000LL);
}

컴파일 시 표준 에러 (stderr) 메시지

city.cpp: In function 'int DistanceSum(int, int*, int*)':
city.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < vec[pos].size(); j++) {
                    ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45