View Compilation Error

0_0_30130274_23514.cpp:33:11: error: redefinition of 'const int MAXN'
 const int MAXN=1e6;
           ^
0_0_30130274_23514.cpp:3:11: note: 'const int MAXN' previously defined here
 const int MAXN=1e6;
           ^
0_0_30130274_23514.cpp: In function 'void gao(ll, ll, ll, ll, ll&, ll&)':
0_0_30130274_23514.cpp:35:6: error: redefinition of 'void gao(ll, ll, ll, ll, ll&, ll&)'
 void gao(ll pa,ll pb,ll qa,ll qb,ll &x,ll &y) {
      ^
0_0_30130274_23514.cpp:5:6: note: 'void gao(ll, ll, ll, ll, ll&, ll&)' previously defined here
 void gao(ll pa,ll pb,ll qa,ll qb,ll &x,ll &y) {
      ^
0_0_30130274_23514.cpp: In function 'int main()':
0_0_30130274_23514.cpp:49:5: error: redefinition of 'int main()'
 int main(){
     ^
0_0_30130274_23514.cpp:19:5: note: 'int main()' previously defined here
 int main(){
     ^