codeforce - Petya and Strings

#include<bits/stdc++.h>
using namespace std;
#define fastread()(ios_base::sync_with_stdio(false),cin.tie(NULL));
int main()
{
    string a,b;
    int sum1=0,sum2=0,i;
    cin>>a>>b;
    for(i=0; i<a.size(); i++)
    {
        sum1=a[i];
        sum2=b[i];
        if(a[i]<97)
            sum1+=32;
        if(b[i]<97)
            sum2+=32;
            if(sum1!=sum2)break;
    }
    if(sum1==sum2)
        printf("0\n");
    else if(sum1<sum2)
        printf("-1\n");
    else
        printf("1\n");
    return 0;
}