Compilare: user.cpp: In function ‘void citire()’: user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^ user.cpp: In function ‘long long int scor(int)’: user.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < a[x].size(); i++) ~~^~~~~~~~~~~~~ user.cpp:38:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, y; ^