Borderou de evaluare (job #833518)

Eroare de compilare: main.cpp: In function 'int main()': main.cpp:11:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 11 | for(int i=0;i<2*n-1;i++) | ^~~ main.cpp:13:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 13 | cin>>a; | ^~~ main.cpp:12:13: warning: unused variable 'a' [-Wunused-variable] 12 | int a; | ^ main.cpp:13:14: error: 'a' was not declared in this scope 13 | cin>>a; | ^ main.cpp: At global scope: main.cpp:16:5: error: 'cout' does not name a type 16 | cout<<sum; | ^~~~ main.cpp:17:5: error: expected unqualified-id before 'return' 17 | return 0; | ^~~~~~ main.cpp:18:1: error: expected declaration before '}' token 18 | } | ^