Compilare: user.cpp: In function ‘int main()’: user.cpp:28:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x<=n) ^ user.cpp:46:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(y<=m) ^ user.cpp:92:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x<=n && y<=m) ^ user.cpp:92:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x<=n && y<=m) ^ user.cpp:97:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x+1<=n) ^ user.cpp:101:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<=n) ^ user.cpp:108:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(y+1<=m) ^ user.cpp:112:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(q<=m) ^ user.cpp:126:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x>=1 && y<=m) ^ user.cpp:141:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(y+1<=m) ^ user.cpp:145:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(q<=m) ^ user.cpp:158:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(x<=n && y>=1) ^ user.cpp:163:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x+1<=n) ^ user.cpp:167:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<=n) ^