Submission #1288819

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288819		thieunguyenhuy	Food Court (JOI21_foodcourt)	C++20	0 / 100	1104 ms	182244 KiB

foodcourt

#include <bits/stdc++.h>
using namespace std;

#define POPCOUNT(n) (__builtin_popcountll((n)))
#define CLZ(n) (__builtin_clzll((n)))
#define CTZ(n) (__builtin_ctzll((n)))
#define LOG(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))

#define Int __int128
#define fi first
#define se second

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef vector<pair<int, int>> vii;
typedef vector<pair<long long, long long>> vll;
typedef vector<pair<long long, int>> vli;
typedef vector<pair<int, long long>> vil;

template <class T1, class T2> bool maximize(T1 &x, T2 y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <class T1, class T2> bool minimize(T1 &x, T2 y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template <class T> void remove_duplicate(vector<T> &ve) {
    sort (ve.begin(), ve.end());
    ve.resize(unique(ve.begin(), ve.end()) - ve.begin());
}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
long long random(long long l, long long r) {
    return uniform_int_distribution<long long>(l, r)(rng);
}
unsigned long long random(unsigned long long l, unsigned long long r) {
    return uniform_int_distribution<unsigned long long>(l, r)(rng);
}
template <class T> T random(T r) {
    return rng() % r;
}

const int N = 25e4 + 5, LG = 19;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;

int n, m, q;

struct SegmentTree {
	struct Node {
		ll mi, ma;
		ll lazyAdd, lazySet;

		Node() {
			mi = ma = 0;
			lazyAdd = 0, lazySet = -INF;
		}

		Node operator+ (const Node &other) {
			Node res;
			res.mi = min(mi, other.mi);
			res.ma = max(ma, other.ma);
			return res;
		}
	};

	vector<Node> nodes;
	int n;

	SegmentTree(int _n) {
		n = _n; nodes.assign(4 * n + 5, Node());
	}

	void apply_set(int id, ll val) {
		nodes[id].mi = nodes[id].ma = val;
		nodes[id].lazySet = val, nodes[id].lazyAdd = 0;
	}

	void apply_add(int id, ll val) {
		nodes[id].mi += val, nodes[id].ma += val;
		if (nodes[id].lazySet != -INF) nodes[id].lazySet += val;
		else nodes[id].lazyAdd += val;
	}

	void push(int id) {
		if (nodes[id].lazySet != -INF) {
			apply_set(id << 1, nodes[id].lazySet);
			apply_set(id << 1 | 1, nodes[id].lazySet);
		}
		else {
			apply_add(id << 1, nodes[id].lazyAdd);
			apply_add(id << 1 | 1, nodes[id].lazyAdd);
		}
		nodes[id].lazySet = -INF, nodes[id].lazyAdd = 0;
	}

	void add(int id, int l, int r, int u, int v, int val) {
		if (l > v || r < u) return;
		if (u <= l && r <= v) {
			if (nodes[id].mi + val >= 0) {
				apply_add(id, val);
				return;
			}
			if (nodes[id].ma + val < 0) {
				apply_set(id, 0);
				return;
			}
		}
		push(id); int mid = (l + r) >> 1;
		add(id << 1, l, mid, u, v, val);
		add(id << 1 | 1, mid + 1, r, u, v, val);
		nodes[id] = nodes[id << 1] + nodes[id << 1 | 1];
	}

	void add(int u, int v, int val) {
		add(1, 1, n, u, v, val);
	}

	ll get(int id, int l, int r, int p) {
		if (l == r) return nodes[id].mi;
		push(id); int mid = (l + r) >> 1;
		if (p <= mid) return get(id << 1, l, mid, p);
		return get(id << 1 | 1, mid + 1, r, p);
	}

	ll get(int p) {
		return get(1, 1, n, p);
	}
};

struct Node {
	int le, ri;
	ll sum;

	Node(ll value = 0) {
		le = ri = 0;
		sum = value;
	}
} nodes[2 * N * LG];
int numNode = 0;
vector<int> version;

struct PersistentIT {
	int n;

	PersistentIT(int _n = 0) {
		n = _n;
	}

	int update(int oldId, int l, int r, int p, int val) {
		if (l > p || r < p) return oldId;

		int id = ++numNode;
		if (l == r) {
			nodes[id] = nodes[oldId];
			nodes[id].sum += val;
			return id;
		}

		int mid = (l + r) >> 1;
		nodes[id].le = update(nodes[oldId].le, l, mid, p, val);
		nodes[id].ri = update(nodes[oldId].ri, mid + 1, r, p, val);

		nodes[id].sum = nodes[nodes[id].le].sum + nodes[nodes[id].ri].sum;
		return id;
	}

	int update(int root, int p, int val) {
		return update(root, 1, n, p, val);
	}

	int update(int root, int l, int r, int val) {
		root = update(root, l, val);
		return update(root, r + 1, -val);
	}

	ll get(int id, int l, int r, int u, int v) {
		if (l > v || r < u) return 0;
		if (u <= l && r <= v) return nodes[id].sum;
		int mid = (l + r) >> 1;
		return get(nodes[id].le, l, mid, u, v) + get(nodes[id].ri, mid + 1, r, u, v);
	}

	ll get(int root, int p) {
		return get(root, 1, n, 1, p);
	}
};

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    cin >> n >> m >> q;

    SegmentTree len(n);
    PersistentIT R(n);

    version.emplace_back(0);
    vector<int> colors = {0};

    for (int i = 1; i <= q; ++i) {
    	int type; cin >> type;
    	if (type == 1) {
    		int l, r, c, k; cin >> l >> r >> c >> k;
    		version.emplace_back(R.update(version.back(), l, r, k));
    		colors.emplace_back(c);
    		len.add(l, r, k);
    	}
    	if (type == 2) {
    		int l, r, k; cin >> l >> r >> k;
    		len.add(l, r, -k);
    		// len.maximize(l, r);
    	}
    	if (type == 3) {
    		int x; ll k; cin >> x >> k;
    		ll rightId = R.get(version.back(), x);
    		ll leftId = rightId - len.get(x);
    		// cerr << leftId << ' ' << rightId << '\n';
    		if (leftId + k > rightId) cout << "0\n";
    		else {
    			// cerr << "hihi " << i << '\n';
    			// int low = 1, high = version.size() - 1, p = -1;
    			// while (low <= high) {
    			// 	int mid = (low + high) >> 1;
    			// 	if (R.get(version[mid], x) >= leftId + k) high = (p = mid) - 1;
    			// 	else low = mid + 1;
    			// }
    			// assert(p != -1);
    			// cout << colors[p] << '\n';
    			cout << m << '\n';
    		} 
    	}

    	// for (int j = 1; j <= n; ++j)
    	// 	cerr << len.get(j) << ' ';
    	// cerr << '\n';
    }

    return 0;
}

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