Main.c: In function 'main':
Main.c:5:9: error: conflicting types for 'N'; have 'int[N][N]'
    5 |     int N[N][N];
      |         ^
Main.c:3:9: note: previous declaration of 'N' with type 'int'
    3 |     int N,M;
      |         ^
Main.c:14:15: warning: too many arguments for format [-Wformat-extra-args]
   14 |         scanf("&d",&a);
      |               ^~~~
Main.c:5:9: warning: unused variable 'N' [-Wunused-variable]
    5 |     int N[N][N];
      |         ^