#include <stdio.h>
int main(void) {
int a,b;
switch(a){
case 1:
if((b>=1)&&(b<=19))
else if((b>=20)&&(b<=31))
else
break;
case 2:
if((b>=1)&&(b<=18))
else if((b>=19)&&(b<=28))
else
break;
case 3:
if((b>=1)&&(b<=20))
else if((b>=21)&&(b<=31))
else
break;
case 4:
if((b>=1)&&(b<=19))
else if((b>=20)&&(b<=30))
else
break;
case 5:
if((b>=1)&&(b<=20))
else if((b>=21)&&(b<=31))
else
break;
case 6:
if((b>=1)&&(b<=21))
else if((b>=22)&&(b<=30))
else
break;
case 7:
if((b>=1)&&(b<=22))
else if((b>=23)&&(b<=31))
else
break;
case 8:
if((b>=1)&&(b<=22))
else if((b>=23)&&(b<=31))
else
break;
case 9:
if((b>=1)&&(b<=22))
else if((b>=23)&&(b<=30))
else
break;
case 10:
if((b>=1)&&(b<=23))
else if((b>=24)&&(b<=31))
else
break;
case 11:
if((b>=1)&&(b<=22))
else if((b>=23)&&(b<=30))
else
break;
case 12:
if((b>=1)&&(b<=21))
else if((b>=22)&&(b<=31))
else
break;
default:
break;
}
return 0;
}
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