Compilare: user.cpp: In function ‘long long unsigned int fill(long long unsigned int*)’: user.cpp:26:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sir[i]-'a'>max)max = sir[i]-'a'; ^ user.cpp: In function ‘long long unsigned int numar(int)’: user.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<=L; j++) sol[0][j]=1; ^ user.cpp:40:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=2; j<=L; j++) ^ user.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<=L; j++)sol[i][j]=0; ^