Compilare: user.cpp: In function ‘void make_r()’: user.cpp:27:29: warning: capture of variable ‘v’ with non-automatic storage duration [enabled by default] sort(begin(r), end(r), [v, s](int a, int b) { return (s[a] == s[b]) ? (v[a] > v[b]) : (s[a] < s[b]); }); ^ user.cpp:8:13: note: ‘std::vector<int> v’ declared here vector<int> v, s, r; ^ user.cpp:27:32: warning: capture of variable ‘s’ with non-automatic storage duration [enabled by default] sort(begin(r), end(r), [v, s](int a, int b) { return (s[a] == s[b]) ? (v[a] > v[b]) : (s[a] < s[b]); }); ^ user.cpp:8:16: note: ‘std::vector<int> s’ declared here vector<int> v, s, r; ^ user.cpp:40:29: warning: capture of variable ‘v’ with non-automatic storage duration [enabled by default] sort(begin(r), end(r), [v](int a, int b) { return v[a] < v[b]; }); } ^ user.cpp:8:13: note: ‘std::vector<int> v’ declared here vector<int> v, s, r; ^ user.cpp: In function ‘int main()’: user.cpp:69:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ant + msk < r.size() && v[r[ant + msk]] < t) ^ user.cpp:75:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ant + msk < r.size() && v[r[ant + msk]] < t) ^