265A - Colorful Stones (Simplified Edition).cpp

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

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define mp make_pair
 
// Code Written By: Vikash Patel
// Codeforces Profile: https://codeforces.com/profile/vikashpatel

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    // #ifndef ONLINE_JUDGE
    // freopen("input.txt", "r", stdin);
    // freopen("/Users/vikash/Desktop/output.txt", "w", stdout);
    // #endif
    
    string s, t;
    cin>>s>>t;
    int liss = 1;
    s = "0" + s;
    for (int i = 0; i < t.size(); i++) 
    {
        if (t[i] == s[liss]) 
        liss++;
    }
    cout<<liss<<endl;
    return 0;
}