Implement Stack Using Array with Push and Pop Operations

Code

#include <stdio.h>
#include <stdint.h>
#include <string.h>

#define MAX 10

void process_stack(int n) {
    // Your logic here
    int s[MAX];
    char cmd[5];
    int idx=-1;
    int val;
    for(int i=0;i<n;i++)
    {
        scanf("%s",cmd);
        if(cmd[1]=='u')
        {   
            scanf("%d",&val);
            if(idx>=MAX-1){printf("Stack Overflow\n");}
            else{s[++idx]=val;}
        }
        if(cmd[1]=='o')
        {   
            if(idx==-1){printf("Stack Underflow\n");}
            else{printf("%d\n",s[idx]);
            idx--;}
        }

    }
}

int main() {
    int n;
    scanf("%d", &n);
    getchar(); // Consume newline after number

    process_stack(n);
    return 0;
}

Solving Approach