Submission #1182615

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182615		Ronin13	Inspections (NOI23_inspections)	C++20	100 / 100	329 ms	34016 KiB

Main

#include <bits/stdc++.h>
#define ll long long 
#define ull unsigned ll
#define f first
#define s second 
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
using namespace std;

const int nmax = 500001;

pii intersect(pii a, pii b) {
    return {max(a.f, b.f), min(a.s, b.s)};
}

void process(vector<pll>&v, vector<ll>&l, vector <ll>&r, vector<ll>&sum, pii x, pii y, int i, int j) {
    if(j == 0) return;
    pii u = intersect(x, y);
    if(u.f > u.s) return;
    ll tot = sum[i - 1] - sum[j];
    tot += r[j] - l[i];
    v.pb({tot, u.s - u.f + 1});
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n, m, q; cin >> n >> m >> q;
    vector <ll> l(m + 1), r(m + 1);
    set <pair<pii, int>> st;
    st.insert({{1, n}, 0});
    vector <pll> v;
    vector <ll> sum(m + 1);
    for(int i = 1; i <= m; i++) {
        cin >> l[i] >> r[i];
        auto it = st.upper_bound({{l[i], r[i]}, -1});
        vector <pair<pii, int>> er;
        vector <pair<pii, int>> in;
        
        if(it != st.begin()) {
            it--;
            pair<pii, int> x = *it;
            process(v, l, r, sum, x.f, {l[i], r[i]},i, x.s);
            if(x.f.s >= l[i]) {
            er.pb(x);
            if(x.f.s > r[i]) {
                if(x.f.f <= l[i] - 1)
                in.pb({{x.f.f, l[i] - 1}, x.s});
                in.pb({{r[i] + 1, x.f.s}, x.s});
            }
            else {
                if(x.f.f <= l[i] - 1)
                in.pb({{x.f.f, l[i] - 1}, x.s});
            }
            }
        }
        it = st.upper_bound({{l[i], r[i]}, -1});
        
        while(it != st.end()) {
            if(it->f.f > r[i]) break;
            pair<pii, int>x = *it;
            process(v, l, r, sum, x.f, {l[i], r[i]}, i, x.s);
            if(x.f.f <= r[i]) {
                er.pb(x);
            }
            if(x.f.s > r[i]) {
                in.pb({{r[i] + 1, x.f.s}, x.s});
            }
            it++;
        }
        for(auto to : er) st.erase(to);
        for(auto to : in) st.insert(to);
        st.insert({{l[i], r[i]}, i});
        sum[i] = sum[i - 1] + r[i] - l[i] + 1;
    }
    sort(v.begin(), v.end(), greater<pll>());
    int id = -1;
    vector <pll> qv;
    vector <ll> ans(q + 1);
    for(int i = 1; i <= q;i++) {
        ll x; cin >> x;
        qv.pb({x, i});
    }
    ll cur = 0;
    sort(qv.begin(), qv.end(), greater<pll>());
    for(int i = 0; i < qv.size(); i++) {
        while(id + 1 < v.size() && v[id + 1].f >= qv[i].f) {
            cur += v[id + 1].s;
            id++;
        }
        ans[qv[i].s] = cur;
    }
    for(int i = 1; i <=  q; i++) cout << ans[i] << ' ';
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 26 / 26
• Subtask 5: 23 / 23