Compilare: main.cpp: In function 'void read()': main.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 21 | for (int i = 0; i < N; i++) | ~~^~~ main.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 25 | for (int i = 0; i < N; i++) | ~~^~~ main.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 27 | for (int j = 0; j < N; j++) | ~~^~~