USACO Open 2019 Open - Compound Escape

Official Analysis (no code)

If you use vectors it's easy to run into issues similar to those mentioned here ...

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#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;
using db = double;
using str = string;  // yay python!

using pi = pair<int, int>;
using pl = pair<ll, ll>;