Compilare: main.cpp: In function 'int main()': main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= m; i++) ~~^~~~ main.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 2; i <= n; i++) ~~^~~~ main.cpp:47:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = 1; j <= n; j++) ~~^~~~ main.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:74:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < counter; i++) ~~^~~~~~~~~