View Compilation Error

0_0_25730504_5230.cpp: In function 'int main()':
0_0_25730504_5230.cpp:11:18: error: 'scanf' was not declared in this scope
     scanf("%d",&T);
                  ^
0_0_25730504_5230.cpp:15:31: error: 'memset' was not declared in this scope
         memset(dp,0,sizeof(dp));
                               ^
0_0_25730504_5230.cpp:42:70: error: 'printf' was not declared in this scope
                 printf("%d%c",(cnt[i] % mod + mod)%mod," \n"[i==n>>1]);
                                                                      ^