acm的一些头文件和调试代码

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#ifndef _local
#define _local
namespace Debug {
    void print() {
        cout << endl;
    }
    template<typename T>
    void print(const T t) {
        cout << t << endl;
    }
    template<typename F, typename...R>
    void print(const F f, const R...r) {
        cout << f << " ";
        print(r...);
    }
    template<typename T>
    void print(T*p, T*q) {
        int d = p < q ? 1 : -1;
        while(p != q) {
            cout << *p << ", ";
            p += d;
        }
        cout << endl;
    }
    template<typename T1, typename T2>
    void print(pair<T1, T2> x) {
        print("first = \"", x.first, "\" second = \"", x.second, "\"");
    }
}

class Timer {
private:
    clock_t _start;
    clock_t _end;

public:
    Timer() { start(); }
    void start() {
        _start = clock();
    }
    double get() {
        _end = clock();
        double usedtime = double(_end - _start) / CLK_TCK;
        cout << "used time: " <<  usedtime << " s\n";
        return usedtime;
    }
};

#endif

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#include <bits/stdc++.h>
using namespace std;
#ifndef ONLINE_JUDGE
    #include "local.h"
#endif
#define X first
#define Y second
#define pb(x) push_back(x)
#define mp(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define mset(a, x) memset(a, x, sizeof(a))
#define mcpy(a, b) memcpy(a, b, sizeof(a))
typedef long long ll;
template<typename T>bool umax(T&a, const T&b){return b<=a?false:(a=b,true);}
template<typename T>bool umin(T&a, const T&b){return b>=a?false:(a=b,true);}

int main() {
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);
#endif // ONLINE_JUDGE

    return 0;
}