Compilare: main.c: In function 'main': main.c:19:70: warning: unused variable 'p2' [-Wunused-variable] int n, m, x, y, i, n1, n2, sf, inc, min, nrmin, u, max, p, max2, p2, nr, ok; ^~ main.c:21:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &n, &m, &x, &y); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:24:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n1, &n2); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~