template.cpp

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

using ll = long long;

void setIO(const string& name = "") {
 ios::sync_with_stdio(false);
 cin.tie(nullptr);

#ifdef ZK_LOCAL_RUN
 freopen("f.in", "r", stdin);
 freopen("f.out", "w", stdout);
#else
 if (!name.empty()) {
 freopen((name + ".in").c_str(), "r", stdin);
 freopen((name + ".out").c_str(), "w", stdout);
 }
#endif
}

int main() { setIO(); }