Submission #1081324

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081324		Trent	Food Court (JOI21_foodcourt)	C++17	13 / 100	106 ms	31312 KiB

foodcourt

#include <iostream>
#include "bits/stdc++.h"
#define forR(i, x) for(int i=0; i < (x); ++i)
#define REP(i, a, b) for(int i=(a); i<(b); ++i)
#define all(x) x.begin(), x.end()
#define boost() cin.sync_with_stdio(0); cin.tie(0)
#define asst(x) if(!(x)) exit(1)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;

const int MN = 3e5 + 10;
int len[MN];
struct ev{
	int ti;
	ll to;
};
ll ch[MN];
int c[MN];
bool us[MN];
vector<ev> evs[MN];
struct query{
	int ai, i; ll b;
};
vector<query> qus[MN];
int ans[MN];
struct node {
	ll ps, psm;
	ll nSum;
};
node seg[4 * MN];
node comb(node a, node b) {
	return {a.ps + b.ps, min(a.psm, a.ps + b.psm), a.nSum + b.nSum};
}
void upd(int v, int nl, int nr, int i, ll to) {
	if(nl == i && nr == i) seg[v] = {to, min(0LL, to), to < 0 ? to : 0};
	else {
		int mid = (nl+nr)/2;
		if(i <= mid) upd(2*v, nl, mid, i, to);
		else upd(2*v+1, mid+1, nr, i, to);
		seg[v] = comb(seg[2*v], seg[2*v+1]);
	}
}
node qu(int v, int nl, int nr, int l, int r) {
	if(l > r) return {0, 0, 0};
	if(nl == l && nr == r) return seg[v];
	int mid = (nl+nr)/2;
	return comb(qu(2*v, nl, mid, l, min(mid, r)),
			qu(2*v+1, mid+1, nr, max(mid+1, l), r));
}
ll amtOf(node cur) {
	return cur.ps - cur.psm - cur.nSum;
}
int getInd(int v, int nl, int nr, int ti, ll need) {
	if(nl == nr) return amtOf(seg[v]) >= need ? nl : -1;
	int mid = (nl+nr)/2;
	ll lefAmt = amtOf(seg[2*v]);
	if(ti <= mid || lefAmt >= need) {
		return getInd(2*v, nl, mid, ti, need);
	}
	return getInd(2*v+1, mid+1, nr, ti, need - lefAmt);
}

int main(){
	boost();
	int n, m, q; cin >> n >> m >> q;
	int ai=0;
	forR(i, q){
		int ty; cin >> ty;
		if(ty == 1){
			int l, r, k; cin >> l >> r >> c[i] >> k;
			evs[l].push_back({i, k});
			evs[r+1].push_back({i, 0});
		} else if(ty == 2){
			int l, r, k; cin >> l >> r >> k;
			evs[l].push_back({i, -k});
			evs[r+1].push_back({i, 0});
		} else {
			int a; ll b; cin >> a >> b;
			qus[a].push_back({ai++, i, b});
		}
	}
	REP(i, 1, n+1){
		for(auto [ti, to] : evs[i]) {
			ch[ti] = to;
			upd(1, 0, q-1, ti, to);
		}
		for(auto [ai, ti, b] : qus[i]) {
			node ati = qu(1, 0, q-1, ti+1, q-1);
			node tot = qu(1, 0, q-1, 0, q-1);

			ll need = b - tot.nSum + ati.nSum;
			int ind = getInd(1, 0, q-1, ti, need);
			if(ind != -1) {
				node thing = qu(1, 0, q-1, 0, ind);
				asst(thing.ps - thing.psm - thing.nSum >= need);
				ans[ai] = c[ind];
			} else ans[ai] = 0;
		}
	}
	forR(i, ai) cout << ans[i] << '\n';
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 21
• Subtask 5: 0 / 15
• Subtask 6: 13 / 13
• Subtask 7: 0 / 26
• Subtask 8: 0 / 11