This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <string>
using namespace std;
int main(){
//freopen("input.txt", "r", stdin);
string input;
int n; scanf("%d", &n);getchar();
getline(cin, input);
int start=0, len=input.size();
while(start < len){
if(input[start] == ' '){
printf(" ");
start+=1;
}
else if(start+1 == len) break;
else if( start+1 < len && input[start+1] == ' '){
printf(" ");
start+=2;
}
else{
int a=input[start]-97;
int b=input[start+1]-97;
int c=(a+b+26-n)%26;
printf("%c", 'a'+c);
// printf("%c", 97+a);
start+=2;
}
}
printf("\n");
return 0;
}
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