Submission #206113

#	Time	Username	Problem	Language	Result	Execution time	Memory
206113		Segtree	Horses (IOI15_horses)	C++14	17 / 100	1588 ms	12156 KiB

horses

#include"horses.h"
#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
typedef long long 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
ll N,X[500010],Y[500010];
int solve(){
	ll id=N-1,t=X[N-1];
	for(int i=N-2;i>=0;i--){
		if(t*Y[id]<Y[i])id=i;
		t*=X[i];
		if(t>(ll)2e9)break;
	}
	ll ans=1;
	for(int i=0;i<=id;i++)ans=ans*X[i]%mod;
	ans=ans*Y[id]%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];
	N=1000;
	rep(i,N)X[i]=1;
	rep(i,N)Y[i]=rand()%(ll)1e9+1;
	cout<<init(N,X,Y)<<endl;
	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:17:13: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  for(int i=N-2;i>=0;i--){
            ~^~
horses.cpp:25:9: warning: conversion to 'int' from 'll {aka long long int}' 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