Hacktoberfest2021/CheckBrackets.cpp at main · Jaya7791/Hacktoberfest2021 · GitHub

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#include<bits/stdc++.h>
using namespace std;

int same(char a, char b)
{
    if (a == '[' && b == ']')
        return 1;
    if (a == '{' && b == '}')
        return 1;
    if (a == '(' && b == ')')
        return 1;
    return 0;
}
int check(char *a)
{
    char stack[1001], top = -1;
    for (int j = 0; j < strlen(a); j++)
    {
        if (a[j] == '[' || a[j] == '{' || a[j] == '(')
            stack[++top] = a[j];
        if (a[j] == ']' || a[j] == '}' || a[j] == ')')
        {
            if (top == -1)
            {
                return 0;
            }
            else
            {
                if (!same(stack[top--], a[j]))
                {
                    return 0;
                }
            }
        }
    }
    if (top != -1)
    {
        return 0;
    }
    return 1;
}
int main()
{
    char a[1001];
    int n, valid;
    cout<<"Enter number of bracket sequences you need to input: ";
    cin>>n;
    for (int i = 0; i < n; i++)
    {
        cout<<"Enter the bracket sequence "<<(i+1)<<" :\n";
        cin>>a;
        valid = check(a);
        if (valid == 1)
            cout<<"YES\n";
        else
            cout<<"NO\n";
    }
    return 0;
}