Compilare: main.cpp: In function 'int main()': main.cpp:60:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:62:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&x,&y,&z); ^ main.cpp: In function 'void solve(int)': main.cpp:33:18: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized] sol[aux] = ++nr; ~~~~~~~~~^~~~~~