Submission #1302237

#	Time	Username	Problem	Language	Result	Execution time	Memory
1302237		nicolo_010	Horses (IOI15_horses)	C++20	17 / 100	1595 ms	9828 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MOD = 1e9+7;

const ll INF = 1e18;

int* x;
int* y;
int n;

int init(int N, int* a, int* b) {
	x = a;
	y = b;
	n = N;
	vector<int> xx, yy;
	xx.push_back(x[0]);
	yy.push_back(y[0]);
	for (int i=1; i<n; i++) {
		if (x[i] == 1) {
			yy.back() = max(yy.back(), y[i]);
		}
		else {
			xx.push_back(x[i]);
			yy.push_back(y[i]);
		}
	}
	ll ans=0;
	ll am=1;
	for (int i=0; i<(int)xx.size(); i++) {
		am *= xx[i];
		am %= MOD;
		ans = max(ans, am*yy[i]);
	}
	return ans;
}

int updateX(int pos, int val) {
	x[pos] = val;
	vector<int> xx, yy;
	xx.push_back(x[0]);
	yy.push_back(y[0]);
	for (int i=1; i<n; i++) {
		if (x[i] == 1) {
			yy.back() = max(yy.back(), y[i]);
		}
		else {
			xx.push_back(x[i]);
			yy.push_back(y[i]);
		}
	}
	ll ans=0;
	ll am=1;
	for (int i=0; i<(int)xx.size(); i++) {
		am *= xx[i];
		am %= MOD;
		ans = max(ans, am*yy[i]);
	}
	return ans;
}

int updateY(int pos, int val) {
	y[pos] = val;
	vector<int> xx, yy;
	xx.push_back(x[0]);
	yy.push_back(y[0]);
	for (int i=1; i<n; i++) {
		if (x[i] == 1) {
			yy.back() = max(yy.back(), y[i]);
		}
		else {
			xx.push_back(x[i]);
			yy.push_back(y[i]);
		}
	}
	ll ans=0;
	ll am=1;
	for (int i=0; i<(int)xx.size(); i++) {
		am *= xx[i];
		am %= MOD;
		ans = max(ans, am*yy[i]);
	}
	return ans;
}

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