Please write down the C or C++ pseudo-code for the following program. You pseudo-code needs to have: 1. correct names of important APIs; 2. correct structure; 3. You do NOT need to write down the list of #include statements.

One process P creates two threads T1 and T2. T1 computes and outputs 1+2+3++99+100; T2 computes and outputs 101+102+103++199+200.

Process P needs to wait for T1 and T2 finish their tasks and then exit.