Help me in solving UWCOI20A problem

help
,
1

My issue

I think the code is fine. how do I fix the runtime error at submission?

My code

#include <stdio.h>

int main(void) {
	// your code goes here
    int t, n, height[n];
    scanf("%d",&t); //test cases input
    scanf("%d",&n); //input n i.e no of mountains
    
    //input the heights of the mountain
    for(int i=0; i<n; i++){
        scanf("%d", &height[i]);
    }
    
    int tallest=height[0]; //assume the first mountain is the highest
    
    for(int i=0; i<n; i++){
        if(height[i]>tallest){
            tallest=height[i];
        }
    }
    printf("%d",tallest); //print the height of the tallest montain found
}

Learning course: Data structures & Algorithms lab
Problem Link: https://www.codechef.com/learn/course/muj-dsa-c/MUJDSAC06/problems/UWCOI20A