Compilare: main.cpp:8:14: warning: capture of variable 'niv' with non-automatic storage duration auto cmp = [&niv, &euler] (const int &a, const int &b) -> bool { ^~~ main.cpp:7:5: note: 'int niv [32001]' declared here int niv[N+1], first[N+1], seg[_log(N)+2][N<<1]; ^~~ main.cpp:8:20: warning: capture of variable 'euler' with non-automatic storage duration auto cmp = [&niv, &euler] (const int &a, const int &b) -> bool { ^~~~~ main.cpp:6:22: note: 'std::vector<int> euler' declared here vector <int> G[N+1], euler; ^~~~~ main.cpp: In function 'int main()': main.cpp:48:51: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] seg[i][j]=min(seg[i-1][j], seg[i-1][j + 1<<(i-1)], cmp); ~~^~~