Eroare de compilare: main.cpp: In function 'int main()': main.cpp:8:5: error: expected ',' or ';' before 'unsigned' 8 | unsigned long long int a, b, rs; | ^~~~~~~~ main.cpp:9:12: error: 'a' was not declared in this scope 9 | fin >> a >> b; | ^ main.cpp:9:17: error: 'b' was not declared in this scope 9 | fin >> a >> b; | ^ main.cpp:10:5: error: 'rs' was not declared in this scope 10 | rs=1+(b+1)*((a+1)*(a+2)/2-1)+(a+1)*((b+1)*(b+2)/2-1)-a*b; | ^~ Non zero exit status: 1