Eroare de compilare: main.cpp:5:1: error: 'ifstream' does not name a type ifstream in("pietre.in"); ^~~~~~~~ main.cpp:6:1: error: 'ofstream' does not name a type ofstream out("pietre.out"); ^~~~~~~~ main.cpp: In function 'int main()': main.cpp:17:5: error: 'in' was not declared in this scope in>>a1; ^~ main.cpp:31:5: error: 'out' was not declared in this scope out<<2; ^~~ main.cpp:33:5: error: 'out' was not declared in this scope out<<1; ^~~ Non zero exit status: 1