Submission #1197976

#	Time	Username	Problem	Language	Result	Execution time	Memory
1197976		JooDdae	Worst Reporter 2 (JOI16_worst_reporter2)	C++20	0 / 100	5 ms	9792 KiB

worst_reporter2

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using Node = array<int, 2>;

#define mid ((l+r) >> 1)

const int INF = 1e9;

int n, a[200200], b[200200], c[200200], d[200200], p[200200], chk[200200], chk2[200200];
map<int, int> mp[200200];

int lz[800800];
Node t[800800];

void lazy_update(int node, int l, int r) {
    if(lz[node]) {
        t[node][0] += lz[node];
        if(l != r) lz[node*2] += lz[node], lz[node*2+1] += lz[node];
        lz[node] = 0;
    }
}

void update(int nl, int nr, int val, int node = 1, int l = 1, int r = n) {
    lazy_update(node, l, r);
    if(nr < l || r < nl) return;
    if(nl <= l && r <= nr) {
        lz[node] += val;
        lazy_update(node, l, r);
        return;
    }
    update(nl, nr, val, node*2, l, mid), update(nl, nr, val, node*2+1, mid+1, r);
    t[node] = min(t[node*2], t[node*2+1]);
}

int ans;

void match(int x, int y) {
    if(a[x] == c[y]) ans++;

    auto id = upper_bound(p+1, p+1+n, y) - p;
    chk[y] = 1, chk2[x] = 1, mp[c[y]].erase(d[y]);

    update(x, x, INF), update(1, id-1, -1);
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    for(int i=1;i<=n;i++) cin >> a[i] >> b[i];
    for(int i=1;i<=n;i++) cin >> c[i] >> d[i];
    
    for(int i=1;i<=n;i++) {
        p[i] = p[i-1];
        while(p[i] < n && d[p[i]+1] >= b[i]) p[i]++;
        mp[c[i]][d[i]] = i;
    }
    
    for(int i=1;i<=4*n;i++) t[i] = {INF, 0};

    for(int i=1, j=1;i<=n;i++) if(!chk[i]) {
        while(t[1][0] == 1) {
            int u = t[1][1];
            while(chk[j]) j++;
            match(u, j);
        }

        auto it = mp[a[i]].lower_bound(b[i]);
        if(it != mp[a[i]].end()) {
            match(i, it->second);
            continue;
        }

        update(i, i, p[i]-INF);
    }

    cout << n-ans;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40