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Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
    // Your logic here
    int left = n - 1;
    int right = 0;
    int tmp = 0;

    while(left > right){
        tmp = arr[left];
        arr[left] = arr[right];
        arr[right] = tmp;
        left--;
        right++;
    }
}

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
        	printf(" ");
        }
    }
    return 0;
}

Solving Approach

 

 

 

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Input

5 1 2 3 4 5

Expected Output

5 4 3 2 1