제출 #1016814

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1016814		NValchanov	마술쇼 (APIO24_show)	C++17	0 / 100	1 ms	820 KiB

Alice

#include <bits/stdc++.h>
#include "Alice.h"
 
#define endl '\n'
 
using namespace std;
 
typedef long long ll;
 
vector < pair < int, int > > Alice()
{
	int x = setN(5000);
  	vector < pair < int, int > > edges;
  	for(int i = 1; i < 5000; i++)
    {
		edges.push_back({x % i + 1, i + 1});
    }
  	return edges;
}

Bob

#include <bits/stdc++.h>
#include "Bob.h"

#define endl '\n'

using namespace std;

typedef long long ll;

/// EXTENDED GCD :(

pair < ll, pair < ll, ll > > extgcd(ll a, ll b)
{
    if(b == 0)
        return {a, {1, 0}};

    pair < ll, pair < ll, ll > > g = extgcd(b, a % b);

    ll d = g.first;
    ll x = g.second.first;
    ll y = g.second.second;

    ll x1 = y;
    ll y1 = x - y * (a / b);

    return {d, {x1, y1}};
}

ll Bob(vector < pair < int, int > > edges)
{

    /// CRT

    ll l = 0;
    ll ans = 0;

    for(pair < int, int > e : edges)
    {
        ll u = e.first;
        ll v = e.second;

        if(u > v)
            swap(u, v);

        u--;
        v--;

        if(ans == 0)
        {
            ans = u;
            l = v;
            continue;
        }

        pair < ll, pair < ll , ll > > g = extgcd(l, v);

        ll d = g.first;
        ll x = g.second.first;
        ll y = g.second.second;

        ans = ans + (x * (u - ans) / d) % (v / d) * l;
        l = l * v / d;
        ans = (ans + l) % l;

        if(l >= 1e18)
            break;
    }

    return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

Bob.cpp: In function 'll Bob(std::vector<std::pair<int, int> >)':
Bob.cpp:59:12: warning: unused variable 'y' [-Wunused-variable]
   59 |         ll y = g.second.second;
      |            ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 30
• Subtask 3: 0 / 65