제출 #1011254

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1011254		Mardonbekhazratov	Horses (IOI15_horses)	C++17	17 / 100	1552 ms	18592 KiB

horses

#include "horses.h"
#include<algorithm>
#include<vector>
#include<iostream>
const int INF=1e9;
const int MOD=1e9+7;

using namespace std;

int n;
vector<int>x,y;

int get(){
	vector<long long>pref(n+1),suff(n+2);
	pref[0]=suff[n+1]=1;
	for(int i=0;i<n;i++){
		pref[i+1]=pref[i]*x[i]%MOD;
		suff[n-i]=min(max(suff[n-i+1]*x[n-i-1],1LL*x[n-i-1]*y[n-i-1]),1LL*MOD);
	}
	int id=-1;
	long long ans=0,cur=1;
	for(int i=0;i<n;i++){
		if(suff[i+1]!=MOD){
			return pref[i]*suff[i+1]%MOD;
		}
	}
	return -1;
}

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


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

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

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int get()':
horses.cpp:24:28: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
   24 |    return pref[i]*suff[i+1]%MOD;
horses.cpp:20:6: warning: unused variable 'id' [-Wunused-variable]
   20 |  int id=-1;
      |      ^~
horses.cpp:21:12: warning: unused variable 'ans' [-Wunused-variable]
   21 |  long long ans=0,cur=1;
      |            ^~~
horses.cpp:21:18: warning: unused variable 'cur' [-Wunused-variable]
   21 |  long long ans=0,cur=1;
      |                  ^~~

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