#include <iostream>
#include <string>

using namespace std;

int findthesmallest (int a[], int size){
    //default value.
    int smallest=a[0];

    for(int i=1;i<size;i++) {
        if(a[i]>0 && a[i]<smallest)
            smallest=a[i];
    }

    if(smallest>0)
        return smallest;
    else return -1;
}

int main () {
    int n[100];
    int smallest;

    smallest=findthesmallest(n,100);

    cout << smallest;

    return 0;
}