Compilare: main.cpp:10:21: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] 10 | unsigned int v[1<<20+1]; | ~~^~ main.cpp: In function 'long long int secv(int)': main.cpp:20:24: warning: comparison of integer expressions of different signedness: 'std::unordered_map<unsigned int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 20 | while(ap.size()>k) | ~~~~~~~~~^~