Compilare: main.c: In function 'main': main.c:6:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:10:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^~~~~~~~~~~~~~~~~~~~~ main.c:23:5: warning: 'pmax' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d %d", pmax + 1, max + 1, smax); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:23:5: warning: 'max' may be used uninitialized in this function [-Wmaybe-uninitialized] main.c:17:27: warning: 'pc' may be used uninitialized in this function [-Wmaybe-uninitialized] if (sc > smax && i-pc>=k) { ~^~~