Submission #1004800

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004800		magikarp23	Horses (IOI15_horses)	C++17	0 / 100	1560 ms	12124 KiB

horses

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

const int MAX_N = 500000 + 1;
long long MOD = 1000000000 + 7;
int X_store[MAX_N];
int Y_store[MAX_N];
int N_store;

// int calc_max_profit() {
// 	int  max_profit = 0;
// 	int num_horses = 1;
// 	for (int i=0; i<N_store; i++) {
// 		num_horses *= X_store[i];
// 		max_profit = max(max_profit, num_horses * Y_store[i]);
// 	}

// 	return max_profit % MOD;	
// }

long long calc_max_profit() {
    vector<long long> dp(N_store + 1, 0);
    long long horses = 1;
    
    for (int i = 0; i < N_store; i++) {
        horses = (horses * X_store[i]) % MOD;
        long long sell_profit = (horses * Y_store[i]) % MOD;
        dp[i + 1] = max((dp[i] + sell_profit) % MOD, (horses * dp[i]) % MOD);
    }
    
    return dp[N_store];
}

int init(int N, int X[], int Y[]) {
	N_store = N;
	for (int i=0; i<N; i++) {
		X_store[i] = X[i];
		Y_store[i] = Y[i];
	}

	return calc_max_profit();	
}

int updateX(int pos, int val) {	
	X_store[pos] = val;

	return calc_max_profit();
}

int updateY(int pos, int val) {
	Y_store[pos] = val;

	return calc_max_profit();	
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:42:24: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   42 |  return calc_max_profit();
      |         ~~~~~~~~~~~~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:48:24: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   48 |  return calc_max_profit();
      |         ~~~~~~~~~~~~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:54:24: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   54 |  return calc_max_profit();
      |         ~~~~~~~~~~~~~~~^~

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