Compilare: main.c: In function 'main': main.c:12:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:14:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:45:3: warning: 'j3' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d %d", j3+1,j4,max); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~