realloc()

Medium Dynamic Memory Allocation

Solve in Playground →

Problem Statement

Write a C program to allocate memory for N integers using malloc, resize it to M integers using realloc, populate, and print.

Input Format

Line 1: N. Line 2: N integers. Line 3: New size M (M > N). Line 4: M - N additional integers.

Output Format

Print all M elements separated by a space.

Constraints

1 <= N < M <= 1000

Sample Input

Sample Output

1 2 3 4

Explanation

realloc() expands the previously allocated block to hold M elements.

Starter Code

#include <stdio.h>
#include <stdlib.h>

int main() {
    int n, m;
    if (scanf("%d", &n) == 1) {
        int *arr = (int *)malloc(n * sizeof(int));
        for (int i = 0; i < n; i++) scanf("%d", &arr[i]);
        if (scanf("%d", &m) == 1) {
            // Write your code here
        }
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

Start Coding in IDE →