Write a program to check the given input string have consecutive '(' or ')' characters or not.

The string is invalid if it contains any character other than '(' and ')'. Statement Sample Input 1:

()()(

Sample Output 1: yes

Sample Input 2: (()()

Sample Output 2: no

Sample Input 3: (((&))

Sample Output 3: invalid

What are the required conditions to be filled in appropriate looping statement to run the program.[Bold]

#include<stdio.h>
#include<string.h>
int main(){
    char a[100];
    int i=0,j=0,f=0;
    gets(a);
    while**()**
    {
        if**()**
        {
        f=1;
        break;  
        }
        i++;

    }
    i=0;
    if()
    {
        while**()**
        {
            if**()**
            {
                j=1;
                break;
            }
            i++;

        }
    }
    if**()**
    print("no");
    else if()
    print("yes");
    else
    print("invalid");

    return 0;
}