View Compilation Error

0_0_37147871_31704.cpp: In function 'void match::init()':
0_0_37147871_31704.cpp:16:35: error: 'memset' was not declared in this scope
     memset(first, -1, sizeof first);
                                   ^
0_0_37147871_31704.cpp: In function 'int match::hungary(int)':
0_0_37147871_31704.cpp:35:37: error: 'memset' was not declared in this scope
     memset(linker, -1, sizeof linker);
                                     ^