Compilare: user.cpp: In member function ‘bool LinearConvexSet::is_bad(std::set<LinearConvexSet::SetElem>::iterator)’: user.cpp:32:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if (it == data.begin() || next(it) == data.end()) ^~ user.cpp:35:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ auto prv = prev(it), nxt = next(it); ^~~~ user.cpp: In function ‘int main()’: user.cpp:85:35: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘LinearConvexSet::T {aka long long int}’ [-Wformat=] printf("%d\n", ch.EvaluateMax(1)); ^ user.cpp:78:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("adunare.in", "r", stdin); ^ user.cpp:79:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("adunare.out", "w", stdout); ^ user.cpp:83:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &a, &b); ^