Submission #1194216

#	Time	Username	Problem	Language	Result	Execution time	Memory
1194216		zyntherix	Experimental Charges (NOI19_charges)	C++20	18 / 100	17 ms	3724 KiB

charges

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pi pair<int, int>
#define vi vector<int>
#define vs vector<string>
#define vb vector<bool>
#define vpi vector<pi>
#define pb push_back
#define all(a) (a).begin(), (a).end()
const int mod = 1e9 + 7;
const int N = 2e5 + 5;
const int N2 = 1e5 + 2;
int par[N];
int siz[N];

void make(int x)
{
    par[x] = x;
    siz[x] = 1;
}

int find(int x)
{
    if (x == par[x])
    {
        return x;
    }
    return par[x] = find(par[x]);
}

void join(int a, int b)
{
    a = find(a);
    b = find(b);
    if (a != b)
    {
        if (siz[a] < siz[b])
        {
            swap(a, b);
        }
        par[b] = a;
        siz[a] += siz[b];
    }
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++)
    {
        make(i);
        make(N2 + i);
    }
    while (q--)
    {
        char c;
        int a, b;
        cin >> c >> a >> b;
        if (c == 'R')
        {
            join(a, b);
            join(N2 + a, N2 + b);
        }
        else if (c == 'A')
        {
            join(a, N2 + b);
            join(b, N2 + a);
        }
        else
        {
            int x = find(a);
            int y = find(b);
            if (x == y)
            {
                cout << "R\n";
            }
            else if (siz[x] > 1 && siz[y] > 1)
            {
                cout << "A\n";
            }
            else
            {
                cout << "?\n";
            }
        }
    }
}

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 14
• Subtask 4: 0 / 12
• Subtask 5: 0 / 25
• Subtask 6: 0 / 31