View Compilation Error

0_0_39836164_31782.cpp: In function 'void solve()':
0_0_39836164_31782.cpp:16:9: error: 'l' was not declared in this scope
   16 |         l = 0, r = n - 1;
      |         ^
0_0_39836164_31782.cpp:16:16: error: 'r' was not declared in this scope
   16 |         l = 0, r = n - 1;
      |                ^