Compilare: user.cpp: In function ‘int main()’: user.cpp:8:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ user.cpp:10:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n-2;i++) ~^~~~~ user.cpp:14:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ user.cpp:15:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i<b || i>b+2) ~^~ user.cpp:15:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i<b || i>b+2) ~^~~~ user.cpp:18:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n-1;i++) ~^~~~~ user.cpp:31:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ user.cpp:32:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i!=b1 && i!=b1+1 && i!=b2 && i!=b2+1) ~^~~~ user.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i!=b1 && i!=b1+1 && i!=b2 && i!=b2+1) ~^~~~~~ user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i!=b1 && i!=b1+1 && i!=b2 && i!=b2+1) ~^~~~ user.cpp:32:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { if(i!=b1 && i!=b1+1 && i!=b2 && i!=b2+1) ~^~~~~~