View Compilation Error

0_0_38704284_2529.cpp: In function 'void solve()':
0_0_38704284_2529.cpp:120:9: error: conflicting declaration 'ull x'
  120 |     ull x;
      |         ^
0_0_38704284_2529.cpp:89:9: note: previous declaration as 'int x'
   89 |     int x;
      |         ^