Submission #18469

#	Time	Username	Problem	Language	Result	Execution time	Memory
18469		choyi0521	코알라 (JOI13_koala)	C++14	100 / 100	253 ms	65484 KiB

koala

#include<stdio.h>
#include<algorithm>
using namespace std;
typedef long long ll;
int k, m, d, a, n;
pair<int, int> p[100000];
struct node{
	ll x;
	node *left, *right;
	node() :x(-2e18), left(NULL), right(NULL){}
};
void update(node *h, int l, int r, int g, ll x){
	if (r < g || g < l) return;
	h->x = max(h->x, x);
	if (l != r){
		if (!h->left) h->left = new node;
		if (!h->right) h->right = new node;
		update(h->left, l, (l + r) / 2, g, x);
		update(h->right, (l + r) / 2 + 1, r, g, x);
	}
}
ll query(node *h, int l, int r, int gl, int gr){
	if (r < gl || gr < l) return -2e18;
	if (gl <= l && r <= gr) return h->x;
	else{
		if (!h->left) h->left = new node;
		if (!h->right) h->right = new node;
		return max(query(h->left, l, (l + r) / 2, gl, gr),
			query(h->right, (l + r) / 2 + 1, r, gl, gr));
	}
}
int main(){
	scanf("%d %d %d %d %d", &k, &m, &d, &a, &n);
	for (int i = 0; i < n; i++)
		scanf("%d %d", &p[i].first, &p[i].second);
	sort(p, p + n);
	node *rt = new node;
	update(rt, 0, d - 1, k%d, (ll)k / d*a);
	for (int i = 0; i < n; i++){
		ll maxi = max((ll)-(p[i].first / d + 1)*a + query(rt, 0, d - 1, 0, p[i].first%d - 1),
			(ll)-p[i].first / d*a + query(rt, 0, d - 1, p[i].first%d, d - 1)) + p[i].second;
		update(rt, 0, d - 1, p[i].first%d, maxi + (ll)p[i].first / d*a);
	}
	printf("%lld", max((ll)-(m / d + 1)*a + query(rt, 0, d - 1, 0, m%d - 1),
		(ll)-m / d*a + query(rt, 0, d - 1, m%d, d - 1)));
	return 0;
}

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