#include <stdio.h>
int main(void) {
int a,b;
switch (a){
case 1:
if(b>=1&&b<=19)
else if(b>=20&&b<=31)
break;
case 2:
if(b>=1&&b<=18)
else if(b>=19&&b<=29)
break;
case 3:
if(b>=1&&b<=20)
else if(b>=21&&b<=31)
break;
case 4:
if(b>=1&&b<=19)
else if(b>=20&&b<=30)
break;
case 5:
if(b>=1&&b<=20)
else if(b>=21&&b<=31)
break;
case 6:
if(b>=1&&b<=21)
else if(b>=22&&b<=30)
break;
case 7:
if(b>=1&&b<=22)
else if(b<=31&&b>=23)
break;
case 8:
if(b>=1&&b<=22)
else if(b>=23&&b<=31)
break;
case 9:
if(b>=1&&b<=22)
else if(b>=23&&b<=30)
break;
case 10:
if(b>=1&&b<=23)
else if(b>=24&&b<=31)
break;
case 11:
if(b>=1&&b<=22)
else if(b>=23&&b<=30)
break;
case 12:
if(b>=1&&b<=21)
else if(b>=21&&b<=31)
break;
default:
break;
}
return 0;
}
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