oj.uz

Submission #1016824

# Submission time Handle Problem Language Result Execution time Memory
1016824 2024-07-08T13:01:18 Z NValchanov Magic Show (APIO24_show) C++17
0 / 100
 3 ms 824 KB 
#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;
}
#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)
{
    ll x = 1;
    ll y = 0;
    
    while(b)
    {
        ll tmp = a / b;
        a -= (tmp * b);
        x -= (tmp * y);
        swap(a, b);
        swap(x, y);
    }

    return {a, {x, y}};
}

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

    /// CRT

    ll l = 0;
    ll ans = 0;

    for(pair < int, int > e : edges)
    {
        if(l >= 1e18)
            break;

        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;
    }

    return ans;
}

Compilation message

Bob.cpp: In function 'll Bob(std::vector<std::pair<int, int> >)':
Bob.cpp:62:12: warning: unused variable 'y' [-Wunused-variable]
   62 |         ll y = g.second.second;
      |            ^

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 820 KB Correct.
2 Incorrect 3 ms 824 KB Incorrect answer.
3 Halted 0 ms 0 KB -

Subtask #2
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 820 KB Correct.
2 Incorrect 3 ms 824 KB Incorrect answer.
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 820 KB Correct.
2 Incorrect 3 ms 824 KB Incorrect answer.
3 Halted 0 ms 0 KB -