Compilare: user.cpp: In function ‘int main()’: user.cpp:114:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("randomizare.in", "r", stdin); ^ user.cpp:115:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("randomizare.out", "w", stdout); ^ user.cpp:117:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:120:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:123:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p[i]); ^ user.cpp: In function ‘void SolveCycle(int)’: user.cpp:105:25: warning: ‘answer’ may be used uninitialized in this function [-Wmaybe-uninitialized] Update(length, answer); ^ user.cpp:108:21: warning: ‘start’ may be used uninitialized in this function [-Wmaybe-uninitialized] start = p[start]; ^