Submission #1085332

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085332		guagua0407	Horses (IOI15_horses)	C++17	34 / 100	1594 ms	16124 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int n;
vector<ll> x,y;
const ll inf=1e9;
const ll mod=1e9+7;

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];
    }
    int best=n-1;
    ll cur=y[n-1];
    for(int i=n-1;i>=0;i--){
        if(y[i]>cur){
            best=i;
            cur=y[i];
        }
        if(cur*x[i]>inf) break;
        cur*=x[i];
    }
    ll ans=1;
    for(int i=0;i<=best;i++){
        ans=ans*x[i]%mod;
    }
    ans=ans*y[best]%mod;
	return ans;
}

int updateX(int pos, int val) {
    x[pos]=val;
    int best=n-1;
    ll cur=y[n-1];
    for(int i=n-1;i>=0;i--){
        if(y[i]>cur){
            best=i;
            cur=y[i];
        }
        if(cur*x[i]>inf) break;
        cur*=x[i];
    }
    ll ans=1;
    for(int i=0;i<=best;i++){
        ans=ans*x[i]%mod;
    }
    ans=ans*y[best]%mod;
	return ans;
}

int updateY(int pos, int val) {
    y[pos]=val;
    int best=n-1;
    ll cur=y[n-1];
    for(int i=n-1;i>=0;i--){
        if(y[i]>cur){
            best=i;
            cur=y[i];
        }
        if(cur*x[i]>inf) break;
        cur*=x[i];
    }
    ll ans=1;
    for(int i=0;i<=best;i++){
        ans=ans*x[i]%mod;
    }
    ans=ans*y[best]%mod;
	return ans;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:39:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   39 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:59:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   59 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:79:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   79 |  return ans;
      |         ^~~

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