View Compilation Error

0_0_37750499_26682.cpp: In function 'void solve()':
0_0_37750499_26682.cpp:202:24: error: 'add' was not declared in this scope
             add(x, 1, 1);
                        ^
0_0_37750499_26682.cpp:207:24: error: 'add' was not declared in this scope
             add(x, 1, 2);
                        ^