View Compilation Error

0_0_37843389_5638.cpp: In function 'int main()':
0_0_37843389_5638.cpp:78:2: error: 'T' was not declared in this scope
  T = read();
  ^
0_0_37843389_5638.cpp:78:11: error: 'read' was not declared in this scope
  T = read();
           ^
0_0_37843389_5638.cpp:79:19: error: 'solve' was not declared in this scope
  while(T--) solve();
                   ^