Submission #206914

#	Time	Username	Problem	Language	Result	Execution time	Memory
206914		jasony123123	Rice Hub (IOI11_ricehub)	C++11	100 / 100	25 ms	1784 KiB

ricehub

#include "ricehub.h"

#include <bits/stdc++.h>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define v vector
typedef long long ll;
typedef pair<int, int > pii;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }

ll P[100000];
#define num(a,b) ((ll)((b)-(a)+1))
#define sum(a,b) ((ll)(P[b]-(a-1<0?0:P[a-1])))


ll cost(int l, int r){
//	cout << "cost  "<< l << " to " << r << endl;
	int m = (l+r)/2;
//	cout << "m = " << m << endl;
//	cout << "num(m+1,r) " << m+1 << " " << r << " " << num(m+1,r) << endl;
//	printf("sum(m+1,r,%d)-num(m+1,r,%d)*sum(m,m,%d)+num(l,m,%d)*sum(m,m,%d)-sum(l,m,%d)\n", sum(m+1,r), num(m+1,r), sum(m,m), num(l,m), sum(m,m), sum(l,m)); 
	return sum(m+1,r)-num(m+1,r)*sum(m,m)+num(l,m)*sum(m,m)-sum(l,m);
}
int besthub(int R, int L, int X[], long long B){
	P[0] = X[0];
	FOR(i,1,R) P[i] = X[i]+P[i-1];
	int ans = 0;
	for(int i = 0, j = -1; i < R; i++){
		while(j+1 < R && cost(i,j+1) <= B)
			j++;
		assert(i<=j);
		maxx(ans, j-i+1);
	}

//	FOR(i,0,R) cout << "x " << X[i] << endl;
//	cout << "budget " << B << endl;
//	FOR(i,0,R) cout << "p " << P[i] << endl;
	return ans;
}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32