Compilare: main.cpp: In instantiation of 'bool majorityElement<T>::findMajorityElement(T&, unsigned int&) [with T = int]': main.cpp:51:46: required from here main.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ap * 2 > elements.size()) res = true, ans = maj, nrAp = ap; main.cpp: In function 'int main()': main.cpp:40:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.in","r",stdin); ^ main.cpp:41:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.out","w",stdout); ^ main.cpp:42:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:46:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^