Submission #206023

#	Time	Username	Problem	Language	Result	Execution time	Memory
206023		Segtree	Horses (IOI15_horses)	C++14	17 / 100	1583 ms	8208 KiB

horses

#include"horses.h"
#include<bits/stdc++.h>
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
typedef __int128 ll;
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)
#define all(x) x,begin(),x.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define mod 1000000007
#define mad(a,b) a=(a+b)%mod
int N,X[500010],Y[500010];
int solve(){
	ll p=N-1,rui=1;
	for(int i=N-1;i>=0;i--){
		rui*=(ll)X[i];
		if(rui>(ll)2e9)break;
		p=i;
	}
	ll ans=0;
	rui=1;
	for(int i=p;i<N;i++){
		rui*=(ll)X[i];
		assert(rui<=2e9);
		chmax(ans,rui*(ll)Y[i]);
	}
	ans%=mod;
	rep(i,p)ans=ans*(ll)X[i]%mod;
	if(ans<0)ans+=mod;
	return ans;
}
int init(int n,int x[],int y[]){
	N=n;
	rep(i,N)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();
}/*
int main(){
	cin>>N;
	rep(i,N)cin>>X[i];
	rep(i,N)cin>>Y[i];
	while(1){
		string type; ll pos,val;
		cin>>type>>pos>>val;
		if(type=="X")cout<<updateX(pos,val)<<endl;
		if(type=="Y")cout<<updateY(pos,val)<<endl;
	}
	
}*/

Compilation message (stderr)

horses.cpp: In function 'int solve()':
horses.cpp:25:12: warning: conversion to 'int' from 'll {aka __int128}' may alter its value [-Wconversion]
  for(int i=p;i<N;i++){
            ^
In file included from /usr/include/c++/7/cassert:44:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:33,
                 from horses.cpp:2:
horses.cpp:27:15: warning: conversion to 'double' from 'll {aka __int128}' may alter its value [-Wconversion]
   assert(rui<=2e9);
               ^
horses.cpp:33:9: warning: conversion to 'int' from 'll {aka __int128}' may alter its value [-Wconversion]
  return ans;
         ^~~

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