Reverse Array

Medium Pointers

Solve in Playground →

Problem Statement

Write a C program to reverse an array in-place using pointers for swapping elements.

Input Format

First line: N. Second line: N space-separated integers.

Output Format

Print the reversed array separated by a space.

Constraints

1 <= N <= 1000

Sample Input

5
1 2 3 4 5

Sample Output

5 4 3 2 1

Explanation

Swaps elements from both ends moving inward using pointer arithmetic.

Starter Code

#include <stdio.h>

void reverse(int *arr, int n) {
    // Write your code here
}

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

Limits

Time Limit: 1s
Memory Limit: 256MB

Start Coding in IDE →