View Compilation Error

0_0_2046370_578.cpp: In function `void init()':
0_0_2046370_578.cpp:12: error: `memset' undeclared (first use this function)
0_0_2046370_578.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2046370_578.cpp: In function `int min_cost_max_flow(int, int, int, int&)':
0_0_2046370_578.cpp:32: error: `memset' undeclared (first use this function)