Submission #572032

#	Time	Username	Problem	Language	Result	Execution time	Memory
572032		beaconmc	말 (IOI15_horses)	C++14	0 / 100	1535 ms	12812 KiB

horses

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
typedef long long ll;

#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
#define double long double
#define SIZE 1048576
#define HSIZE 524288
#define MOD 1000000007
// #include "horses.h"
using namespace std;

vector<ll> x, y, xx, yy;
ll n;


ll tree[SIZE];

void update(ll a,ll b){
    a += HSIZE;
    tree[a] = b;
    while (a>1){
        a/=2;
        tree[a] = tree[a*2]*tree[a*2+1]%MOD;
    }
}

ll query(ll a, ll b){
    a += HSIZE;
    b += HSIZE;
    ll maxi = 1;
    while (a<=b){
        if (a%2==1){
            maxi *= tree[a++]; 
            maxi %= MOD;
        }
        if (b%2==0){
            maxi *= tree[b--];
            maxi %= MOD;
        }
        a/=2; b/=2;
    }
    return maxi;
}



int solve(){
	ll maxsum = 1;
	ll maxpos = -1;
	ll cur = 1;

	FOR(i,0,n){
		cur *= x[i];
		if (y[i] * cur >= maxsum){
			cur = 1;
			maxsum = y[i];
			maxpos = i;
		}
	}


	


	return (query(0, maxpos) * maxsum) % 1000000007;

}

int init(int N, int X[], int Y[]) {
	n = N;
	FOR(i,0,N){
		x.push_back(X[i]);
		y.push_back(Y[i]);
	}
	return solve();

}

int updateX(int pos, int val) {	
	update(pos, val);
	return solve();
}

int updateY(int pos, int val) {
	y[pos] = val;
	return solve();

}



// int main(){
// 	ll n = 10;
// 	int x[10] = {10, 10, 10, 10, 10, 10, 1, 1, 1, 1};
// 	int y[10] = {1, 1, 1, 1, 9, 5, 4, 7, 3, 2};

// 	cout << init(n, x, y) << endl;

// 	cout << updateX(5, 1) << endl;
// 	cout << updateY(5, 123456789) << endl;
// 	cout << updateX(5, 1) << endl;
// 	cout << updateX(8, 987654321) << endl;


// }

Compilation message (stderr)

horses.cpp: In function 'int solve()':
horses.cpp:67:37: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   67 |  return (query(0, maxpos) * maxsum) % 1000000007;
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~

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