/in/foo.cc: In function 'int main()':
/in/foo.cc:11:19: warning: 'cost3' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int cost1,cost2,cost3;
                   ^~~~~
/in/foo.cc:11:13: warning: 'cost2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int cost1,cost2,cost3;
             ^~~~~