View Compilation Error

0_0_16819275_19514.cpp:2:4: error: stray '#' in program
  2 #define N 100010
    ^
0_0_16819275_19514.cpp:2:2: error: expected unqualified-id before numeric constant
  2 #define N 100010
  ^
0_0_16819275_19514.cpp:4:2: error: expected unqualified-id before numeric constant
  4 int mark[N];
  ^
0_0_16819275_19514.cpp:5:2: error: expected unqualified-id before numeric constant
  5 int find(int x){
  ^
0_0_16819275_19514.cpp:10:1: error: expected unqualified-id before numeric constant
 10 void merge(int a,int b){
 ^
0_0_16819275_19514.cpp:15:1: error: expected unqualified-id before numeric constant
 15 int main(){
 ^