Submission #795498

#	Time	Username	Problem	Language	Result	Execution time	Memory
795498		jasmin	Horses (IOI15_horses)	C++17	17 / 100	1574 ms	8148 KiB

horses

#include "horses.h"
#include<bits/stdc++.h>
using namespace std;

const long long MOD=1e9+7;
int n=0;
vector<int> x;
vector<int> y;

bool bigger(pair<int,int> a, pair<int,int> b){
    return a.first*b.second > a.second*b.first;
}

int solveSlow(){

    long long p=1; bool mod=false;
    pair<int,int> maxi={1, 1}; int ind=n-1;
    for(int i=n-1; i>=0; i--){

        if(!mod){
            
            if(bigger({y[i], p}, maxi)){
                maxi={y[i], p};
                ind=i;
            }
            
        }

        p*=x[i];
        if(p>MOD){
            p%=MOD;
            mod=true;
        }

    }

    int ans=1;
    for(int i=0; i<=ind; i++){
        ans *= x[i];
        ans%=MOD;
    }

    ans*=y[ind];
    ans%=MOD;
    return ans;
}

int init(int N, int X[], int Y[]) {
    n=N;
    x.assign(n, 0);
    y.assign(n, 0);
    for(int i=0; i<N; i++){
        x[i]=X[i];
        y[i]=Y[i];
    }

	return solveSlow();
}

int updateX(int pos, int val) {	
	
    x[pos]=val;
    return solveSlow();
}

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

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