Compilare: main.cpp: In function 'int main()': main.cpp:72:23: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 72 | for (size_t i = 0; i < nr; i++) | ~~^~~~ main.cpp:95:23: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 95 | for (size_t i = 0; i < nr; i++) | ~~^~~~