Submission #105799

#	Time	Username	Problem	Language	Result	Execution time	Memory
105799		gs18103	먼 별 (KOI16_dist)	C++98	42 / 100	95 ms	636 KiB

dist

#include <bits/stdc++.h>

using namespace std;

long long arr[1010][4];
long long ans;
int n, T;
long long dp[10101010];

long long cal_dis(int t)
{
	if(dp[t] != 0) return dp[t];
	long long dis = 0;
	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < i; j++)
		{
			dis = max(dis, (arr[i][0]-arr[j][0]+t*(arr[i][2]-arr[j][2]))*(arr[i][0]-arr[j][0]+t*(arr[i][2]-arr[j][2]))+
						   (arr[i][1]-arr[j][1]+t*(arr[i][3]-arr[j][3]))*(arr[i][1]-arr[j][1]+t*(arr[i][3]-arr[j][3])));
		}
	}
	return dp[t] = dis;
}

int search(int s, int e)
{
	if(s + 5 >= e)
	{
		long long dis = 10000000000000000LL;
		for(int i = s; i <= e; i++)
			dis = min(dis, cal_dis(i));
		for(int i = s; i <= e; i++)
			if(dis == cal_dis(i)) return i;
	}
	int t1 = (2 * s + e) / 3, t2 = (s + 2 * e) / 3;
	long long dis1 = cal_dis(t1), dis2 = cal_dis(t2);
	if(dis1 <= dis2) return search(s, t2);
	else return search(t1, e);
}

int main()
{
	scanf("%d %d", &n, &T);
	for(int i = 0; i < n; i++)
		for(int j = 0; j < 4; j++)
			scanf("%lld", &arr[i][j]);
	int ans = search(0, T);
	printf("%d\n%lld", ans, cal_dis(ans));
}

Compilation message (stderr)

dist.cpp: In function 'int main()':
dist.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &T);
  ~~~~~^~~~~~~~~~~~~~~~~
dist.cpp:46:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%lld", &arr[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 40 / 40
• Subtask 3: 0 / 39
• Subtask 4: 0 / 19