Compilare: user.cpp: In function ‘int main()’: user.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= m; i ++) ^ user.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= m && nod <= n - 1; i ++) ^ user.cpp:50:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= m && nod <= n - 1; i ++) ^ user.cpp:44:18: warning: unused variable ‘loc’ [-Wunused-variable] int i,nr = 0,loc = 0,nod = 0,ri,rj; ^