Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:47:13: error: invalid conversion from ‘int’ to ‘const char*’ [-fpermissive] puts(ans); ^ In file included from /usr/include/c++/4.8/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:692:12: error: initializing argument 1 of ‘int puts(const char*)’ [-fpermissive] extern int puts (__const char *__s); ^ user.cpp:32:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm2.in", "r", stdin); ^ user.cpp:33:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm2.out", "w", stdout); ^ user.cpp:34:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:37:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", v + i); ^