/in/foo.cc: In function 'int main()':
/in/foo.cc:37:9: error: 'ans' was not declared in this scope
         ans+=edge[i].w;
         ^~~
/in/foo.cc:38:14: error: 'cnt' was not declared in this scope
         if(++cnt==(n-k)) break;
              ^~~
/in/foo.cc:40:19: error: 'ans' was not declared in this scope
     printf("%d\n",ans);
                   ^~~