Submission #921284

#	Time	Username	Problem	Language	Result	Execution time	Memory
921284		ByeWorld	Horses (IOI15_horses)	C++14	0 / 100	32 ms	33876 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fi first
#define se second
#define pb push_back
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
const int MAXN = 2e5+10;
const int MOD = 1e9+7;
typedef pair<int,int> pii;
typedef pair<int,pii> ipii;

ll mul(ll x, ll y){
	ll num = (x*y)%MOD;
	return num;
}
int n;
ll pr[MAXN], ans[MAXN], x[MAXN], y[MAXN], mx, idx;
ld lx[MAXN], ly[MAXN];

int calc(){
	pr[0] = 1, mx = -1, idx = -1;
	ld cur = 0, MX = 0; 
	for(int i=1; i<=n; i++){
		pr[i] = mul(pr[i-1], x[i]);
		cur += lx[i];
		if(MX < cur + ly[i]){
			MX = cur + ly[i];
			idx = i;
		}
	}
	return (int)mul(pr[idx], y[idx]);
}

int init(int N, int X[], int Y[]) {
	n = N;
	for(int i=1; i<=n; i++) {
		x[i] = X[i-1]; y[i] = Y[i-1];
		lx[i] = log2(x[i]); ly[i] = log2(y[i]);
	}
	return calc();
}

int updateX(int pos, int val) {	
	x[pos+1] = val; lx[pos+1] = log2(val);
	return calc();
}

int updateY(int pos, int val) {
	y[pos+1] = val; ly[pos+1] = log2(val);
	return calc();
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23