#include <stdio.h>
#include <math.h>

int main () {
    int n,i,wn;
    float cur,rp,min;

    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);

    scanf("%d", &n);

    min = 1;

    for ( i = 0; i < n; i++){
        scanf("%f", &cur);
        rp = fabs(ceil(cur) - cur);
        if (rp < min){
            min = rp;
            wn = i+1;
        }

    }

    printf ("%d\n",wn);

}