제출 #1091395

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1091395		andrei_iorgulescu	Joker (BOI20_joker)	C++14	컴파일 에러	0 ms	0 KiB

Joker

#include <bits/stdc++.h>

using namespace std;

int n, m, q;
int u[200005], v[200005];
int rmin[200005];

pair<int, int> t[200005];
bool bip[200005];
int cnt_bad;

pair<int, int> par(int x)
{
    int s1 = 0;
    while (t[x].first != x)
    {
        s1 += t[x].second;
        x = t[x].first;
    }
    return make_pair(x, s1 % 2);
}

void join(int idx, int x, int y)
{
    pair<int,int> p1 = par(x);
    pair<int,int> p2 = par(y);
    if (p1.first != p2.first)
    {
        t[p2.first] = make_pair(p1.first, (1 + p1.second + p2.second) % 2);
    }
    else
    {
        if (p1.second == p2.second)
            cnt_bad++;
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> n >> m >> q;
    for (int i = 1; i <= m; i++)
        cin >> u[i] >> v[i];
    for (int i = 1; i <= n; i++)
    {
        t[i] = {i, 0};
        sz[i] = 1;
        bip[i] = true;
    }
    rmin[1] = 1;
    for (int i = m; i >= 1; i--)
    {
        join(i, u[i], v[i]);
        if (cnt_bad != 0)
        {
            rmin[1] = i + 1;
            break;
        }
    }
    for (int i = 1; i <= q; i++)
    {
        int x, y;
        cin >> x >> y;
        assert(x <= y);
        if (rmin[x] > y)
            cout << "YES\n";
        else
            cout << "NO\n";
    }
    return 0;
}

/**
deci teoretic daca bag elementele de la 1 la N, apoi fac two pointers-ul, o sa cam am queue-like undoing pe DSU, pe care tin si ceva de bipartit
**/

컴파일 시 표준 에러 (stderr) 메시지

Joker.cpp: In function 'int main()':
Joker.cpp:50:9: error: 'sz' was not declared in this scope
   50 |         sz[i] = 1;
      |         ^~