I was solving some problems and I found an interesting thing regarding the execution times on the server. If anyone could provide me with an explanation it would be amazing. Thanks :)

Here are the links to the submissions :

1 : 62ms

2 : 30ms

For those who didn't check the submissions here's what happened :

62ms code :

int n;
cin>>n;

cout<<3*n/2<<endl;
return 0;

30ms code :

string str0,str1;
cin>>str0>>str1;

int cnt=0;
str0+="$";
int len=str1.length();
REP(i,len)
    if(str1[i]==str0[cnt])
        ++cnt;

cout<<cnt+1<<endl;

return 0;

}

No matter how I look at it the second code should have more exec time right?

Any help regarding this is highly appreciated.