Compilare: main.cpp: In function 'int main()': main.cpp:40:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:45:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:48:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i = 1; i <= n; i++) ~~^~~~