View Compilation Error

0_0_34176386_1024.cpp: In function 'std::vector<int> solve(int)':
0_0_34176386_1024.cpp:41:35: error: 'memset' was not declared in this scope
     memset(used,false,sizeof(used));
                                   ^
0_0_34176386_1024.cpp: In function 'void init()':
0_0_34176386_1024.cpp:70:29: error: 'memset' was not declared in this scope
     memset(deg,0,sizeof(deg));
                             ^