12 lines
175 B
C
12 lines
175 B
C
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#include<stdio.h>
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#include<ctype.h>
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int main()
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{
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char a;
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scanf("%c",&a);
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if (a == toupper(a)) printf("%c", tolower(a));
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else printf("%c", toupper(a));
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return 0;
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}
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