Mã nộp #419246 | Đếm dương với ước chung lớn nhất

/bin/chown: invalid user: ‘judge’
Main.cc: In function ‘int demso(int)’:
Main.cc:15:22: error: ‘n’ was not declared in this scope
   15 |     for(int i =1; i<=n; i++) {
      |                      ^
Main.cc: In function ‘int main()’:
Main.cc:25:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   25 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cc:28:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   28 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~