codeforces 706A A. Beru-taxi(水题)

时间:2021-05-29 05:47:07

题目链接:

A. Beru-taxi

题意:

问那个taxi到他的时间最短,水题;

AC代码:

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <bits/stdc++.h>
#include <stack>
#include <map> using namespace std; #define For(i,j,n) for(int i=j;i<=n;i++)
#define mst(ss,b) memset(ss,b,sizeof(ss)); typedef long long LL; template<class T> void read(T&num) {
char CH; bool F=false;
for(CH=getchar();CH<'0'||CH>'9';F= CH=='-',CH=getchar());
for(num=0;CH>='0'&&CH<='9';num=num*10+CH-'0',CH=getchar());
F && (num=-num);
}
int stk[70], tp;
template<class T> inline void print(T p) {
if(!p) { puts("0"); return; }
while(p) stk[++ tp] = p%10, p/=10;
while(tp) putchar(stk[tp--] + '0');
putchar('\n');
} const LL mod=1e9+7;
const double PI=acos(-1.0);
const int inf=1e18;
const int N=1e5+10;
const int maxn=5e3+4;
const double eps=1e-12; int n;
double a,b,x[maxn],y[maxn];
double getdis(double fx,double fy,double fa,double fb)
{
return sqrt((fx-fa)*(fx-fa)+(fb-fy)*(fb-fy));
}
int main()
{
scanf("%lf%lf",&a,&b);
read(n);
double ans=inf,v;
For(i,1,n)
{
scanf("%lf%lf%lf",&x[i],&y[i],&v);
ans=min(ans,getdis(a,b,x[i],y[i])/v);
}
printf("%.10lf\n",ans);
return 0;
}