#includechar exchange(char n) { if(n>='a'&&n<='z') { n=n-32; } else { n=n+32; } return n; } int main() { char k; scanf("%c",&k); exchange(k); printf("%c",exchange(k)); return 0; }
#includechar exchange(char n) { if(n>='a'&&n<='z') { n=n-32; } else { n=n+32; } return n; } int main() { char k; scanf("%c",&k); exchange(k); printf("%c",exchange(k)); return 0; }
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