max_distance_same_values.c

#include<stdio.h>
#include<stdlib.h>
/*
find max distance between two exact values of array
*/

int main(){


    int arr[] = {1,9,3,1,4,5,9,1,1,9};
    size_t N = sizeof(arr)/sizeof(int);
    int max_distance = 0;

    for(int i=0;i<N;i++){

        for(int j=N-1;j>=0;j--){

            if(arr[i]==arr[j]){
                if(max_distance<abs(i-j)){
                    max_distance=abs(i-j);
                                        break;
                }
            }

        }
    }

    printf("%d",max_distance);
    return 0;
}