View Compilation Error

0_0_30638205_13753.cpp: In function 'int main()':
0_0_30638205_13753.cpp:58:29: error: 'memset' was not declared in this scope
   memset(last,0,sizeof(last));
                             ^
0_0_30638205_13753.cpp:70:27: error: 'h' was not declared in this scope
    printf("%d\n",max(f[i],h[i]));
                           ^