Wrong Answer
/in/foo.cc: In function 'void change(int, int, int)':
/in/foo.cc:30:41: warning: right operand of comma operator has no effect [-Wunused-value]
temp=min(c[t],c[t^1]),c[t]-=temp,c[t^1];
~~~~~^
/in/foo.cc: In function 'void change(int, int, int)':
/in/foo.cc:30:41: warning: right operand of comma operator has no effect [-Wunused-value]
temp=min(c[t],c[t^1]),c[t]-=temp,c[t^1];
~~~~~^
