提供一下我的个人理解,希望对你有帮助,希望大佬们及时更正 #include<bits/stdc++.h> #define fi first #define sc second using namespace std; typedef pair<int,int> PII; typedef long long LL; int n; void solve() { cin>>n; vector<vector<LL>> a(2,vector<LL>(n+2,0)); vector<LL> sum1(n+2,0),sum2...