Cipher

//https://www.hackerearth.com/practice/basic-programming/input-output/basics-of-input-output/practice-problems/algorithm/cipher-1/
#include<stdio.h>
int main()
{
    char s[1000];
    scanf("%s",s);
    int i,k;
    scanf("%d",&k);
    for(i=0;s[i]!='\0';i++)
    {
        int t;
        if(s[i]>=65 && s[i]<=90)
        {
            t=s[i]+k%26;
            if(t<=90)
                s[i]=t;
            else
                s[i]=64+t%90;
        }
        else if(s[i]>=48 && s[i]<=57)
        {
            t=s[i]+k%10;
            if(t<=57)
                s[i]=t;
            else
                s[i]=47+t%57;
        }
        else if(s[i]>=97 && s[i]<=122)
        {
            t=s[i]+k%26;
            if(t<=122)
                s[i]=t;
            else
                s[i]=96+t%122;
        }
    }
    for(i=0;s[i]!='\0';i++)
        printf("%c",s[i]);
}