Problem:
Score: 200 points

Problem Statement

A country decides to build a palace.

In this country, the average temperature of a point at an elevation of x meters is T-x \times 0.006 degrees Celsius.

There are N places proposed for the place. The elevation of Place i is H_i meters.

Among them, Princess Joisino orders you to select the place whose average temperature is the closest to A degrees Celsius, and build the palace there.

Print the index of the place where the palace should be built.

It is guaranteed that the solution is unique.

Constraints

1 \leq N \leq 1000

0 \leq T \leq 50

-60 \leq A \leq T

0 \leq H_i \leq 10^5

All values in input are integers.

The solution is unique.

Input

Input is given from Standard Input in the following format:

N
T A
H_1 H_2 ... H_N

Output

Print the index of the place where the palace should be built.

Sample Input 1

2
12 5
1000 2000

Sample Output 1

1

The average temperature of Place 1 is 12-1000 \times 0.006=6 degrees Celsius.

The average temperature of Place 2 is 12-2000 \times 0.006=0 degrees Celsius.

Thus, the palace should be built at Place 1.

Sample Input 2

3
21 -11
81234 94124 52141

Sample Output 2

3

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <math.h>
#define MAXSIZE 1000

int main(void){
    int n, t, a, h[MAXSIZE];
    scanf("%d %d %d", &n, &t, &a);
    double meantemp[MAXSIZE], diff, mindiff = 707.7;
    int ans = 0;
    for(int i = 0; i < n; i++){
        scanf("%d", &h[i]);
        meantemp[i] = (double)t - h[i] * 0.006;
        diff = fabs((double)a - meantemp[i]);
        if(diff < mindiff){
            mindiff = diff;
            ans = i;
        }
    }
    printf("%d\n", ans + 1);
    return 0;
}