Compilare: user.cpp: In function ‘void sol()’: user.cpp:36:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < bucket[j].size(); k++) ^ user.cpp: In function ‘void citire()’: user.cpp:14:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &a, &b, &c); ^ user.cpp: In function ‘int main()’: user.cpp:55:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:56:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out", "w", stdout); ^