Submission #145737

#	Time	Username	Problem	Language	Result	Execution time	Memory
145737		maruii	코알라 (JOI13_koala)	C++14	100 / 100	128 ms	8232 KiB

koala

#include <bits/stdc++.h>
using namespace std;
#define eack emplace_back
#define all(x) (x).begin(), (x).end()

vector<int> xx;

const int SIZE = 1 << 17;
struct ST {
	struct Node {
		long long v = -4e18, lazy;
	} A[2 * SIZE];
	int sz;
	void lazydown(int nn, int ns, int m, int ne) {
		A[nn << 1].v += A[nn].lazy;
		A[nn << 1].lazy += A[nn].lazy;
		A[nn << 1 | 1].v += A[nn].lazy;
		A[nn << 1 | 1].lazy += A[nn].lazy;
		A[nn].lazy = 0;
	}
	void updateP(int nn, int ns, int ne, int x, long long v) {
		if (x > ne || x < ns) return;
		auto &cur = A[nn];
		if (ns == ne) {
			cur.v = max(cur.v, v);
			return;
		}
		int m = ns + ne >> 1;
		lazydown(nn, ns, m, ne);
		updateP(nn << 1, ns, m, x, v);
		updateP(nn << 1 | 1, m + 1, ne, x, v);
		cur.v = max(A[nn << 1].v, A[nn << 1 | 1].v);
	}
	void update(int nn, int ns, int ne, int s, int e, long long v) {
		if (ns > e || ne < s) return;
		auto &cur = A[nn];
		if (s <= ns && ne <= e) {
			cur.v += v;
			cur.lazy += v;
			return;
		}
		int m = ns + ne >> 1;
		lazydown(nn, ns, m, ne);
		update(nn << 1, ns, m, s, e, v);
		update(nn << 1 | 1, m + 1, ne, s, e, v);
		cur.v = max(A[nn << 1].v, A[nn << 1 | 1].v);
	}
	void updateP(int x, long long v) {
		updateP(1, 0, sz, x, v);
	}
	void update(int s, int e, long long v) {
		update(1, 0, sz, s, e, v);
	}
	long long query() {
		lazydown(1, 0, sz >> 1, sz);
		return A[1].v;
	}
} seg;
	
int T[100005], B[100005], S[100005];

int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int K, M, D, A, N; cin >> K >> M >> D >> A >> N;
	for (int i = 1; i <= N; ++i)
		cin >> T[i] >> B[i];
	T[0] = K; T[N + 1] = M;
	
	for (int i = 0; i <= N + 1; ++i) xx.eack(T[i] % D);	
	sort(all(xx));
	xx.erase(unique(all(xx)), xx.end());
	for (int i = 0; i <= N + 1; ++i) {
		S[i] = lower_bound(all(xx), T[i] % D) - xx.begin();
	}

	seg.sz = xx.size() - 1;
	seg.updateP(S[0], 0);

	long long t = 0;
	for (int i = 1; i <= N + 1; ++i) {
		seg.update(0, seg.sz, -1ll * (T[i] - T[i - 1]) / D * A);
		if (S[i] >= S[i - 1]) seg.update(S[i - 1], S[i] - 1, -A);
		else {
			seg.update(S[i - 1], seg.sz, -A);
			seg.update(0, S[i] - 1, -A);
		}
		t = seg.query() + B[i];
		seg.updateP(S[i], t);
	}
	cout << t;
	return 0;
}

Compilation message (stderr)

koala.cpp: In member function 'void ST::updateP(int, int, int, int, long long int)':
koala.cpp:28:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~
koala.cpp: In member function 'void ST::update(int, int, int, int, int, long long int)':
koala.cpp:42:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = ns + ne >> 1;
           ~~~^~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50