Compilare: main.cpp: In function 'int main()': main.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:47:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:50:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = i; j <= n; j++) ~~^~~~