---

Lỗi biên dịch:

Main.cc: In function ‘int main()’:
Main.cc:12:9: error: conflicting declaration ‘int a’
   12 |     int a,b;
      |         ^
Main.cc:9:13: note: previous declaration as ‘int a [100000][100000]’
    9 |         int a[100000][100000]={0};
      |             ^
Main.cc:13:8: error: expected ‘;’ before ‘while’
   13 |     t=n
      |        ^
      |        ;
   14 |     while(n-->1){
      |     ~~~~~
Main.cc:12:11: warning: unused variable ‘b’ [-Wunused-variable]
   12 |     int a,b;
      |           ^
Main.cc:11:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   11 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~