23 lines
387 B
C
23 lines
387 B
C
#include <stdio.h>
|
|
#include <ctype.h>
|
|
|
|
/* written on new year's eve 2020
|
|
* good night and good riddance */
|
|
|
|
char newchar(char c, int i) {
|
|
if(i % 2) {
|
|
if(islower(c)) return c - 32;
|
|
} else if(isupper(c)) return c + 32;
|
|
if(c == 33) return -2;
|
|
return c;
|
|
}
|
|
int main(void) {
|
|
char c;
|
|
int i;
|
|
i = 0;
|
|
while((c = getchar()) != EOF) {
|
|
putchar(newchar(c, i));
|
|
i++;
|
|
}
|
|
}
|