Submission #134169

#	Time	Username	Problem	Language	Result	Execution time	Memory
134169		Runtime_error_	Horses (IOI15_horses)	C++14	17 / 100	18 ms	8440 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const ll inf = 1e3+9,mod = 1e9+7;
ll n,dp[inf],x[inf],y[inf];

int calc(){

    ll cur = 1,ret = 0;
	for(int i=1;i<=n;i++){
        dp[i] = 0;
        cur = 1;
        for(int j=i;j>0;j--){
            cur = (cur*x[j])%mod;
            dp[i] = max(dp[i], (mod+dp[j-1]-y[j-1] + (cur*y[i])%mod)%mod );
        }

        ret = max( ret ,dp[i] );
        //cout<<dp[i]<<" ";
	}
	return (int)ret;
}

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];

    return calc();
}

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

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

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