View Compilation Error

0_0_21704432_25739.cpp: In function 'bool spfa(int, int, int&, int&)':
0_0_21704432_25739.cpp:92:35: error: return-statement with no value, in function returning 'bool' [-fpermissive]
  if (cost + d[ee] * a[ee] > cost) return;
                                   ^