Compilare: main.cpp: In function 'int main()': main.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:26:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = 1; j <= m; j++) ~~^~~~ main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= n; i++) ~~^~~~ main.cpp:38:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t j = 1; j <= m; j++) ~~^~~~ main.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= g; i++) ~~^~~~ main.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= g; i++) ~~^~~~ main.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i <= g; i++) ~~^~~~