View Compilation Error

0_0_32799651_31680.cpp:42:35: error: expected ',' or '...' before '%' token
 bool cmp(const pai&a, const pai &b%2
                                   ^
0_0_32799651_31680.cpp:42:36: error: expected ')' at end of input
 bool cmp(const pai&a, const pai &b%2
                                    ^
0_0_32799651_31680.cpp:42:36: error: expected initializer at end of input