/in/foo.cc: In function 'int SPFA(int, int)':
/in/foo.cc:30:17: error: 'judge' was not declared in this scope
     if (!judge(1)) return INF;
                 ^
/in/foo.cc:31:5: error: 'queue' was not declared in this scope
     queue<int> q;
     ^~~~~
/in/foo.cc:31:11: error: expected primary-expression before 'int'
     queue<int> q;
           ^~~
/in/foo.cc:33:22: error: 'q' was not declared in this scope
     d[1]=0; in[1]=1; q.push(1);
                      ^
/in/foo.cc:39:25: error: 'judge' was not declared in this scope
             if (!judge(v)) continue;
                         ^