Compilare: user.cpp: In function ‘void Taie(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)’: user.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=i1;i<=i2;i++) ^ user.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=j1;j<=j2;j++) ^ user.cpp: In function ‘int main()’: user.cpp:43:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x<lmin) lmin=x; ^ user.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x>lmx) lmx=x; ^ user.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (y<cmin) cmin=y; ^ user.cpp:46:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (y>cmx) cmx=y; ^