View Compilation Error

0_0_20374955_25581.cpp: In function 'int main()':
0_0_20374955_25581.cpp:16:2: error: 'nbsp' was not declared in this scope
    int N;
  ^
0_0_20374955_25581.cpp:20:28: error: 'memset' was not declared in this scope
   memset(d,0,sizeof(d));
                            ^