Compilare: main.cpp: In function 'int main()': main.cpp:58:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 58 | for (size_t i = 0; i < n; i++) | ~~^~~ main.cpp:61:30: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 61 | for (size_t j = 0; j < m; j++) | ~~^~~