제출 #748248

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
748248		Abrar_Al_Samit	도시들 (IOI15_towns)	C++17	25 / 100	16 ms	1104 KiB

towns

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

const int nax = 110;

int from0[nax];
int from_en[2][nax];
int en1, en2;

int hubDistance(int N, int sub) {
	int mx = 0;
	for(int i=1; i<N; ++i) {
		from0[i] = getDistance(0, i);
		if(mx<from0[i]) {
			mx = from0[i];
			en1 = i;
		}
	}

	mx = 0;
	for(int i=0; i<N; ++i) {
		from_en[0][i] = getDistance(i, en1);
		if(from_en[0][i]>mx) {
			mx = from_en[0][i];
			en2 = i;
		}
	}
	for(int i=0; i<N; ++i) {
		from_en[1][i] = getDistance(i, en2);
	}

	int R = 2e9;
	map<int, int>groups;
	for(int i=0; i<N; ++i) {
		int a_plus_b = from_en[0][en2];
		int a_plus_c = from_en[0][i];
		int b_plus_c = from_en[1][i];

		int b = (b_plus_c - a_plus_c + a_plus_b) / 2;
		int c = b_plus_c - b;
		int a = a_plus_b - b;

		R = min(R, max(a, b));

		groups[b]++;
	}

	for(auto it : groups) if(it.second>N/2) {
		R = -R;
		break;
	}
	return R;
}

컴파일 시 표준 에러 (stderr) 메시지

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:41:7: warning: unused variable 'c' [-Wunused-variable]
   41 |   int c = b_plus_c - b;
      |       ^
towns.cpp:11:28: warning: unused parameter 'sub' [-Wunused-parameter]
   11 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~

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• Subtask 2: 12 / 12
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• Subtask 6: 0 / 39