Compilare: main.c: In function 'main': main.c:9:3: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] gets(s+1),k=p[1]=d=0,n=strlen(s+1); ^~~~ main.c:7:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("prefix.in","r",stdin),freopen("prefix.out","w",stdout),scanf("%d\n",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:33: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("prefix.in","r",stdin),freopen("prefix.out","w",stdout),scanf("%d\n",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:66: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("prefix.in","r",stdin),freopen("prefix.out","w",stdout),scanf("%d\n",&t); ^~~~~~~~~~~~~~~~ ./ccAAjhfq.o: In function `main': main.c:(.text.startup+0x67): warning: the `gets' function is dangerous and should not be used.