View Compilation Error

0_0_27736892_9597.cpp:57:6: error: redefinition of 'int N'
  int N,M;
      ^
0_0_27736892_9597.cpp:5:6: note: 'int N' previously declared here
  int N,M;
      ^
0_0_27736892_9597.cpp:57:8: error: redefinition of 'int M'
  int N,M;
        ^
0_0_27736892_9597.cpp:5:8: note: 'int M' previously declared here
  int N,M;
        ^
0_0_27736892_9597.cpp:58:12: error: redefinition of 'int a [20000]'
 int a[20000];
            ^
0_0_27736892_9597.cpp:6:5: note: 'int a [20000]' previously declared here
 int a[20000];
     ^
0_0_27736892_9597.cpp: In function 'int findzhouqi()':
0_0_27736892_9597.cpp:59:5: error: redefinition of 'int findzhouqi()'
 int findzhouqi()
     ^
0_0_27736892_9597.cpp:7:5: note: 'int findzhouqi()' previously defined here
 int findzhouqi()
     ^
0_0_27736892_9597.cpp: In function 'int main()':
0_0_27736892_9597.cpp:79:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_27736892_9597.cpp:27:5: note: 'int main()' previously defined here
 int main()
     ^