Compilare: user.c: In function ‘main’: user.c:9:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^~~~~~~~~~~~~~~~~~~~~ user.c:18:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^~~~~~~~~~~~~~~~~~~~~ user.c:14:11: warning: iteration 100098 invokes undefined behavior [-Waggressive-loop-optimizations] if(e[i]==i) ~^~~ user.c:13:5: note: within this loop for(i=2; i<=VM; i++) ^~~ user.c:12:11: warning: iteration 100098 invokes undefined behavior [-Waggressive-loop-optimizations] e[i]=i; ~~~~^~ user.c:11:5: note: within this loop for(i=2; i<=VM; i++) ^~~