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>
#include <cstring>
int main() {
int n, i=0;
char str[103];
scanf("%d", &n);
getchar();
while(scanf("%s", str)) {
int len = strlen(str);
for(int i=0; i<len; i++) {
char y = str[i];
i++;
if(i == len) break;
char z = str[i];
char x = y-'a'+z-'a'-n;
if(x >= 26) x %= 26;
while(x<0) {
x+=26;
}
printf("%c", x+'a');
}
printf(" ");
}
}
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