滚烫的青春

摘要： 1 #include <bits/stdc++.h> 2 using namespace std; 3 struct node 4 { 5 int val; 6 int tag; 7 node(int a = 0, int b = 0) : val(a), tag(b){} 8 }; 9 long long fib(int x) 10 { 11 stack<node> s; 12 long lon 阅读全文