View Compilation Error

0_0_33345388_6484.cpp: In function 'int main()':
0_0_33345388_6484.cpp:106:16: error: 'Build' was not declared in this scope
   Build(1, 1, n);
                ^
0_0_33345388_6484.cpp:120:15: error: 'Query' was not declared in this scope
    Query(x, -1); //减去原有贡献
               ^
0_0_33345388_6484.cpp:121:26: error: 'Update' was not declared in this scope
    Update(1, 1, n, x, val); //更新数值
                          ^