#include <iostream>
using namespace std;
int main() {
int n, i;
float result;
int* arr;
int max = -999999999;
int min = 999999999;
scanf("%d", &n);
arr = (int*)malloc(n * sizeof(int));
for (i = 0; i < n; i++) {
scanf("%d", &arr[i]);
}
for (i = 0; i < n; i++) {
if (arr[i] < min) {
min = arr[i];
}
if (arr[i] > max) {
max = arr[i];
}
}
result = max / min;
printf("%f", result);
return 0;
}
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