Submission #384553

#	Time	Username	Problem	Language	Result	Execution time	Memory
384553		ritul_kr_singh	금 캐기 (IZhO14_divide)	C++17	100 / 100	46 ms	7660 KiB

divide

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << ' ' <<
#define nl << '\n'

struct SegmentTree{
	vector<int> a; int sz = 1, ID = 1e18;
	SegmentTree(vector<int> &v){
		while(sz < (int)v.size()) sz += sz;
		a.assign(2*sz, ID);
		build(v, 0, 0, sz);
	}
	void build(vector<int> &v, int x, int lx, int rx){
		if(rx-lx==1){
			if(lx<(int)v.size()) a[x] = v[lx];
			return;
		}
		int mx = (lx+rx)/2;
		build(v, 2*x+1, lx, mx);
		build(v, 2*x+2, mx, rx);
		a[x] = min(a[2*x+1], a[2*x+2]);
	}
	int get(int val, int x, int lx, int rx){
		if(rx-lx==1) return (a[x] <= val ? lx : sz);
		int mx = (lx+rx)/2;
		if(a[2*x+1]<=val) return get(val, 2*x+1, lx, mx);
		if(a[2*x+2]<=val) return get(val, 2*x+2, mx, rx);
		return sz;
	}
	int get(int val){ return get(val, 0, 0, sz); }
};

signed main(){
	cin.tie(0)->sync_with_stdio(0);

	int n, ans = 0; cin >> n;
	vector<int> a(n+1), b(n+1), c(n+1);
	for(int i=1; i<=n; ++i){
		cin >> c[i] >> b[i] >> a[i];
		ans = max(ans, b[i]);
		a[i] += a[i-1];
		b[i] += b[i-1];
	}
	for(int i=0; i<n; ++i) a[i] -= c[i+1];

	SegmentTree st(a);
	for(int i=1; i<=n; ++i){
		int sub = (i < n ?  c[i+1] : 0LL);
		int j = st.get(a[i] + sub - c[i]);
		if(j<i) ans = max(ans, b[i] - b[j]);
	}
	cout << ans;
}

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 52 / 52