src/util/random.hpp

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Last update: 2026-01-30 22:16:29+09:00
Include: #include "src/util/random.hpp"

Depends on

src/template.hpp

Code

#include "../template.hpp"

struct Random {
    mt19937 mt;
    Random(){
        random_device rd;
        auto seed=rd()^std::chrono::steady_clock::now().time_since_epoch().count();
        mt.seed(seed);
    }
    int randint(int l,int r){  //[a,b]
        uniform_int_distribution<int> dist(l,r);
        return dist(mt);
    }
    float randfloat(int l=0,int r=1){
        uniform_real_distribution<float> dist(l,r);
        return dist(mt);
    }
    int operator()(){
        return mt();
    }
}

#line 2 "src/template.hpp"
#include <bits/stdc++.h>
using namespace std;
#define si(a) (long)a.size()
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(int)(n);++i)
template<typename S,typename F> bool chmin(S&a,F b){return b<a?(a=b,1):0;}
template<typename S,typename F> bool chmax(S&a,F b){return b>a?(a=b,1):0;}
bool _=(ios::sync_with_stdio(0),cin.tie(0),cout<<fixed<<setprecision(16),0);
#line 2 "src/util/random.hpp"

struct Random {
    mt19937 mt;
    Random(){
        random_device rd;
        auto seed=rd()^std::chrono::steady_clock::now().time_since_epoch().count();
        mt.seed(seed);
    }
    int randint(int l,int r){  //[a,b]
        uniform_int_distribution<int> dist(l,r);
        return dist(mt);
    }
    float randfloat(int l=0,int r=1){
        uniform_real_distribution<float> dist(l,r);
        return dist(mt);
    }
    int operator()(){
        return mt();
    }
}