/in/foo.cc: In function 'int main()':
/in/foo.cc:53:9: warning: unused variable 't' [-Wunused-variable]
 int n,m,t=0,b=0,c=0,max=0;
         ^
/in/foo.cc:53:13: warning: unused variable 'b' [-Wunused-variable]
 int n,m,t=0,b=0,c=0,max=0;
             ^