View Compilation Error

0_0_16348203_19597.cpp: In member function 'void segment_tree::pd(int)':
0_0_16348203_19597.cpp:62:24: error: return-statement with a value, in function returning 'void' [-fpermissive]
   if (!flag[x]) return 0;
                        ^
0_0_16348203_19597.cpp:63:30: error: return-statement with a value, in function returning 'void' [-fpermissive]
   if (tl[x] == tr[x]) return 0;
                              ^
0_0_16348203_19597.cpp: In member function 'void segment_tree::phiit(int, int, int)':
0_0_16348203_19597.cpp:86:32: error: return-statement with a value, in function returning 'void' [-fpermissive]
         if (mx[x] <= 1) return 0;
                                ^