View Compilation Error

0_0_19698797_31787.cpp:68:8: error: redefinition of 'struct node'
 struct node
        ^
0_0_19698797_31787.cpp:9:8: error: previous definition of 'struct node'
 struct node
        ^
0_0_19698797_31787.cpp:72:18: error: redefinition of 'int flag [1000010]'
 int  flag[1000010];
                  ^
0_0_19698797_31787.cpp:13:6: note: 'int flag [1000010]' previously declared here
 int  flag[1000010];
      ^
0_0_19698797_31787.cpp: In function 'int main()':
0_0_19698797_31787.cpp:73:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_19698797_31787.cpp:14:5: note: 'int main()' previously defined here
 int main()
     ^