#include<stdio.h>
int main(){
    int n, i;
    printf("Enter the number of altitude records(n): ");
    scanf("%d" ,&n);
    if(n < 0){
        printf("Invalid input\n");
        return 1;
    }
    if(n == 0){
        printf("No altitude to process.\n");
        return 0;
    }
    int altitudes;
    int max_altitude;
    printf("Enter the %d altitude records:\n", n);
    for(i =0; i<n; i++){
        scanf("%d", &altitude);
    }
    max_altitude = altitudes[0];
    for(i = 1; i < n; i++){
        if (altitudes > max_altitude){
            max_altitude = altitudes;
        }
    }
    printf("the heighest altitude reached is: %d\n", max_altitude);
    return 0;
}