제출 #97892

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
97892		someone_aa	말 (IOI15_horses)	C++17	0 / 100	22 ms	11520 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int maxn = 100100;
const ll mod = 1e9 + 7;
ll x[maxn], y[maxn], n;

int solve() {
    ll h = 1LL;
    ll result = (1LL * x[0] * y[0])%mod;
    ll prod = 1LL;
    ll pref = x[0];
    ll ind = 0;
    for(int i=1;i<n;i++) {
        prod *= x[i];
        ll curr = prod * y[i];
        pref *= x[i]; pref %= mod;
        if(curr >= y[ind]) {
            // buy this one
            result = (pref * y[ind])%mod;
            prod = 1LL;
            ind = i;
        }
        else {
            prod *= x[i];
        }
    }
    return result%mod;
}

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

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

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

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int solve()':
horses.cpp:29:18: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return result%mod;
            ~~~~~~^~~~
horses.cpp:10:8: warning: unused variable 'h' [-Wunused-variable]
     ll h = 1LL;
        ^

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