View Compilation Error

0_0_11112920_10994.cpp: In function `int find()':
0_0_11112920_10994.cpp:8: error: `memset' undeclared (first use this function)
0_0_11112920_10994.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11112920_10994.cpp: In function `int maxflow()':
0_0_11112920_10994.cpp:22: error: `memset' undeclared (first use this function)
0_0_11112920_10994.cpp:6: error: too many arguments to function `int find()'
0_0_11112920_10994.cpp:23: error: at this point in file
0_0_11112920_10994.cpp: In function `int main()':
0_0_11112920_10994.cpp:51: error: `memset' undeclared (first use this function)