Compilare: main.cpp: In function 'int main()': main.cpp:72:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (j = 0; j < xs[i + NMAX].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:73:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (k = j + 1; k < xs[i + NMAX].size(); k++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:54:5: warning: 'cine' may be used uninitialized [-Wmaybe-uninitialized] 54 | if (cine) | ^~ main.cpp:35:10: note: 'cine' was declared here 35 | bool cine; | ^~~~