Compilare: main.cpp: In function 'int main()': main.cpp:22:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:28:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^ main.cpp:72:12: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%d %d %d\n",mi,y+1,x+1); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~