View Compilation Error

0_0_27842343_15172.cpp: In function 'void prepare()':
0_0_27842343_15172.cpp:22:27: error: 'memset' was not declared in this scope
     memset(fa,0,sizeof(fa));
                           ^
0_0_27842343_15172.cpp: In function 'int make(long long int)':
0_0_27842343_15172.cpp:44:30: error: 'memset' was not declared in this scope
     memset(up1,-1,sizeof(up1));
                              ^
0_0_27842343_15172.cpp: In function 'int main()':
0_0_27842343_15172.cpp:92:37: error: 'memset' was not declared in this scope
         memset(start,0,sizeof(start));
                                     ^