Compilare: main.cpp: In function 'void descompunere_pe_niveluri()': main.cpp:33:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (int i=0; i<niv[nrniv].size(); i++) | ~^~~~~~~~~~~~~~~~~~ main.cpp:38:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int j=0; j<g[x].size(); j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void afisare()': main.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int j=0;j<niv[i].size();j++) | ~^~~~~~~~~~~~~~