Compilare: user.cpp: In function ‘int main()’: user.cpp:13:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=X[i][1];j<=X[i][2];j++) ^ user.cpp:22:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }if(a==nr) ^ user.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(c<=nr) ^ user.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(c==nr) ^ user.cpp:13:24: warning: array subscript is above array bounds [-Warray-bounds] for(j=X[i][1];j<=X[i][2];j++) ^