제출 #62791

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
62791		BBang3	화살표 그리기 (KOI18_arrowH)	C++14	100 / 100	81 ms	16488 KiB

arrow

#include <cstdio>
#include <algorithm>
#include <math.h>
#include <vector>
using namespace std;

int N;
vector<int> P[100000 + 5];
int main()
{
	scanf("%d", &N);
	for (int i = 1; i <= N; i++)
	{
		int pos, color;
		scanf("%d %d", &pos, &color);
		P[color].push_back(pos);
	}
	for (int i = 1; i <= N; i++)
	{
		sort(P[i].begin(), P[i].end());
	}

	long long ans = 0;
	for (int i = 1; i <= N; i++)
	{
		if (P[i].size() <= 1) continue;
		for (int j = 0; j < P[i].size(); j++)
		{
			if (j == 0) ans += abs(P[i][j] - P[i][j + 1]);
			else if (j == P[i].size() - 1) ans += abs(P[i][j] - P[i][j - 1]);
			else ans += min(abs(P[i][j] - P[i][j - 1]), abs(P[i][j] - P[i][j + 1]));
		}
	}
	printf("%lld", ans);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

arrow.cpp: In function 'int main()':
arrow.cpp:27:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < P[i].size(); j++)
                   ~~^~~~~~~~~~~~~
arrow.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    else if (j == P[i].size() - 1) ans += abs(P[i][j] - P[i][j - 1]);
             ~~^~~~~~~~~~~~~~~~~~
arrow.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
arrow.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &pos, &color);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 12 / 12
• Subtask 3: 29 / 29
• Subtask 4: 38 / 38