Compilare: main.cpp: In function 'void bellman_ford(int)': main.cpp:21:29: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 21 | for (size_t node = 1; node < nodes; node++) | ~~~~~^~~~~~~ main.cpp:33:29: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 33 | for (size_t node = 1; node < nodes; node++) | ~~~~~^~~~~~~ main.cpp: In function 'int main()': main.cpp:69:24: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 69 | for (size_t i = 2; i <= nodes; i++) | ~~^~~~~~~~