Compilare: user.cpp: In function ‘int irelj(int, int)’: user.cpp:9:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(u=1;u<=a[i][0];u++) //a[i][0] e numarul de elemente pe linia i ^ user.cpp:10:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(v=1;v<=a[j][0];v++) ^ user.cpp: In function ‘int apartine(int, int)’: user.cpp:18:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (val==a[linie][j]) ^ user.cpp: In function ‘void reuneste(int, int)’: user.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(u=1;u<=a[j][0];u++) ^ user.cpp: In function ‘int main()’: user.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=k;j++) ^ user.cpp:46:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:48:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:52:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<=n;j++) ^ user.cpp:68:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:71:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=i+1;j<=n;j++) ^