摘要：
A - 2UP3DOWN #include<bits/stdc++.h> using namespace std; #define int long long void solve() { int a, b; cin >> a >> b; if (a < b and b - a <= 2) cout 阅读全文
摘要：
A - First ABC 2 #include <bits/stdc++.h> using namespace std; #define int long long #define mp make_pair using vi = vector<int>; using pii = pair<int, 阅读全文