Compilare: user.cpp: In function ‘void solveX()’: user.cpp:65: warning: comparison between signed and unsigned integer expressions user.cpp:67: warning: comparison between signed and unsigned integer expressions user.cpp:71: warning: operation on ‘N’ may be undefined user.cpp:84: warning: operation on ‘nn’ may be undefined user.cpp: In function ‘void solveY()’: user.cpp:104: warning: comparison between signed and unsigned integer expressions user.cpp:106: warning: comparison between signed and unsigned integer expressions user.cpp:110: warning: operation on ‘N’ may be undefined user.cpp:123: warning: operation on ‘nn’ may be undefined