View Compilation Error

0_0_17021878_3134.cpp: In function 'void init()':
0_0_17021878_3134.cpp:50:33: error: 'memset' was not declared in this scope
     memset(vis,false,sizeof(vis));
                                 ^
0_0_17021878_3134.cpp: In function 'int main()':
0_0_17021878_3134.cpp:71:33: error: 'memset' was not declared in this scope
         memset(deg,0,sizeof(deg));
                                 ^