View Compilation Error

0_0_39086601_770.cpp: In function 'long long int query(int, int, int, int, int)':
0_0_39086601_770.cpp:60:17: error: return-statement with no value, in function returning 'long long int' [-fpermissive]
   60 |         if(a>b) return ;
      |                 ^~~~~~