Compilare: main.cpp: In function 'int main(int, char**)': main.cpp:79:24: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 79 | for (size_t i = 1; i <= n; i++) { | ~~^~~~ main.cpp:80:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 80 | for (size_t j = 1; j <= n; j++) { | ~~^~~~