Compilare: user.cpp: In function ‘int main()’: user.cpp:100:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("urat.in","r",stdin); ^ user.cpp:101:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("urat.out","w",stdout); ^ user.cpp:103:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp: In function ‘void solve_panaete()’: user.cpp:82:66: warning: ‘dif’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 1; i < n; i++) dif += 1LL * abs(sol[i] - sol[i - 1]); ^