Compilare: user.cpp: In function ‘int rest2(std::deque<int>, int)’: user.cpp:17:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (register int i = 0; i < A.size(); -- i) ^ user.cpp: In function ‘std::deque<int> Adunare(std::deque<int>, std::deque<int>)’: user.cpp:47:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (register int i = 0; i < aux.size() || i < other.size() || t != 0; ++ i) { ^ user.cpp:47:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (register int i = 0; i < aux.size() || i < other.size() || t != 0; ++ i) { ^ user.cpp:48:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == aux.size()) ^ user.cpp:51:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < other.size()) ^ user.cpp: In function ‘std::deque<int> Scadere(std::deque<int>, std::deque<int>)’: user.cpp:65:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(register int i = 0; i < aux.size(); ++ i) { ^ user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] aux[i] -= ((i < other.size()) ? other[i] : 0) + t; ^ user.cpp: In function ‘int main()’: user.cpp:101:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("doi.in", "r", stdin); ^ user.cpp:102:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("doi.out", "w", stdout); ^ user.cpp:108:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d\n", &T); T; -- T) { ^