Compilare: user.cpp: In function ‘int main()’: user.cpp:29:24: warning: operation on ‘k’ may be undefined [-Wsequence-point] A[++k][++A[k][0]]=x; ^ user.cpp:35:32: warning: operation on ‘k’ may be undefined [-Wsequence-point] A[++k][++A[k][0]]=x; ^ user.cpp:28:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&x); ^ user.cpp:32:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^ user.cpp:44:25: warning: ‘rasp’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=1;i<=A[rasp][0];i++) ^