View Compilation Error

0_0_9414092_12691.cpp: In function `int hungary(int)':
0_0_9414092_12691.cpp:46: error: `mat' undeclared (first use this function)
0_0_9414092_12691.cpp:46: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9414092_12691.cpp:46: error: expected `;' at end of input
0_0_9414092_12691.cpp:46: error: expected `}' at end of input
0_0_9414092_12691.cpp:46: error: expected `}' at end of input