Compilare: main.cpp: In function 'int main()': main.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<n; i++) ~^~ main.cpp:43:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1; j<=n; j++) ~^~~ main.cpp:55:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<n; i++) ~^~ main.cpp:73:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<n; i++) ~^~