洛谷题解
A
不知道为什么题目挂了, 直接求前缀和板子题, 这题甚至不用开 ll
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,…
The Challenge: PSA Key Replacement Woes
For automotive repair shops and PSA vehicle owners alike, finding a reliable, cost-effective remote key replacement can be a frustrating experience. Dealerships …