View Compilation Error

0_0_21982605_29174.cpp:5:7: error: 'LL' does not name a type
 const LL mod = 1000000007;
       ^
0_0_21982605_29174.cpp:7:10: error: 'N' was not declared in this scope
 int flag[N];
          ^
0_0_21982605_29174.cpp: In function 'int main()':
0_0_21982605_29174.cpp:11:27: error: expected ')' before '{' token
     while (scanf("%d",&n) {
                           ^
0_0_21982605_29174.cpp:12:16: error: 'flag' was not declared in this scope
         memset(flag, 0, sizeof(flag));
                ^
0_0_21982605_29174.cpp:18:30: error: 'M' was not declared in this scope
         for (int i = 1; i <= M; i++) {
                              ^