View Compilation Error

0_0_4133556_14956.cpp: In function `void Dinic()':
0_0_4133556_14956.cpp:52: error: `ans' undeclared (first use this function)
0_0_4133556_14956.cpp:52: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4133556_14956.cpp:58: error: `oo' undeclared (first use this function)
0_0_4133556_14956.cpp: In function `int main()':
0_0_4133556_14956.cpp:148: error: void value not ignored as it ought to be