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 <cstdio>
using namespace std;
int main()
{
int n;
char a = -1, b = -1, ans;
scanf("%d\n", &n);
while(1){
scanf("%c", &b);
if (b == -1)
break;
else if (b == ' ' || b == '\n'){
printf(" ");
a = -1;
}
else if (a == -1)
a = b;
else{
a-='a';
b-='a';
ans = (a+b-n)%26;
ans+='a';
printf("%c",ans);
a=-1;
}
}
printf("\n");
return 0;
}
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