#include <stdio.h>
int main(void) {
int a,b;
switch(a)
{
case 3:
if(21<=b&&b<=31)
else
break;
case 4:
if(1<=b&&b<=19)
else
break;
case 5:
if(0<=b&&b<=20)
else
break;
case 6:
if(0<=b&&b<=21)
else
break;
case 7:
if(1<=b&&b<=22)
else
break;
}
return 0;
}
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