Compilare: user.cpp: In function ‘int main()’: user.cpp:29:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:31:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.cpp:11:9: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(pas+sol<=x && c[pas+sol]<n){ ^ user.cpp:34:6: note: ‘x’ was declared here int x; ^