#include<stdio.h>
int findHighestAltitude(int arr[], int size){
    if(size <= 0){
        printf("Invalid input\n");
        return -1;
    }
    int highest = arr[0];
    for(int i = 1; i < size; i++){
        if (arr[i] > highest){
            highest = arr[i];
        }
    }
    return highest;
}
int main(){
    int n;
    printf("Enter the number of altitude records: ");
    scanf("%d", &n);
    if(n <= 0){
      printf("Invalid input\n");
      return 0;
    }
    int altitudes;
    printf("Enter %d altitude records:\n", n);
    for(int i = 0; i < n; i++){
        scanf("%d", &altitudes[i]);
    }
    int highestAltitude = findHighestAltitude(altitudes, n);
    if(highestAltitude != -1){
        printf("The highest altitude reached is: %d\n", highestAltitude);
    }
    return 0;
}