제출 #874132

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
874132		HuyQuang_re_Zero	말 (IOI15_horses)	C++14	100 / 100	520 ms	62120 KiB

horses

#include <bits/stdc++.h>
#define ll long long
#define db long double
#define II pair <ll,ll>
#define III pair <ll,II>
#define IV pair <vector <int>,vector <int> >
#define TII pair <treap*,treap*>
#define fst first
#define snd second
#define BIT(x,i) ((x>>i)&1)
#define pi acos(-1)
#define to_radian(x) (x*pi/180.0)
#define to_degree(x) (x*180.0/pi)
#define Log(x) (31-__builtin_clz((int)x))
#define LogLL(x) (63-__builtin_clzll((ll)x))
#include "horses.h"
using namespace std;
const ll mod=round(1e9)+7;
set <int> s;
struct pt { ll x,y; };
pt operator + (pt a,pt b) { return { a.x*b.x%mod,max(a.y,b.y) }; }
int x[500005],y[500005],n,i,u,q,type,pos,val;
struct Interval_Tree
{
    pt st[4*500005];
    void update(int id,int l,int r,int u)
    {
        if(l==r) { st[id]={ x[u],y[u] }; return ; }
        int mid=(l+r)>>1;
        if(u<=mid) update(id*2,l,mid,u);
        else update(id*2+1,mid+1,r,u);
        st[id]=st[id*2]+st[id*2+1];
    }
    pt get(int id,int l,int r,int u,int v)
    {
        if(u>r || v<l) return { 1,0 };
        if(u<=l && r<=v) return st[id];
        int mid=(l+r)>>1;
        return get(id*2,l,mid,u,v)+get(id*2+1,mid+1,r,u,v);
    }
} IT;
int Cal()
{
    set <int>::iterator it=s.end();
    ll ma=0,res=0,last=n+1;
    while(it!=s.begin())
    {
        it--;
        int u=*it;
        ll k=IT.get(1,1,n,u,last-1).y;
        if(ma<k)
        {
            ma=k;
            res=IT.get(1,1,n,1,u).x*ma%mod;
        }
        ma=ma*x[u];
        if(ma>round(1e9)) break;
        last=u;
    }
    return res;
}
int init(int _n,int _x[],int _y[])
{
    n=_n;
    s.insert(0);
    for(i=n;i>=1;i--)
    {
        x[i]=_x[i-1],y[i]=_y[i-1];
        if(x[i]>=2) s.insert(i);
        IT.update(1,1,n,i);
    }
    x[0]=1;
    return Cal();
}
int updateX(int u,int k)
{
    u++;
    s.erase(u);
    x[u]=k;
    if(x[u]>=2) s.insert(u);
    IT.update(1,1,n,u);
    return Cal();
}
int updateY(int u,int k)
{
    u++;
    y[u]=k;
    IT.update(1,1,n,u);
    return Cal();
}
/*
int main()
{
    freopen("horse.inp","r",stdin);
    freopen("horse.out","w",stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin>>n;
    for(i=0;i<n;i++) cin>>x[i];
    for(i=0;i<n;i++) cin>>y[i];
    cout<<init(n,x,y)<<'\n';
    cin>>q;
    while(q--)
    {
        cin>>type>>pos>>val;
        if(type==1) cout<<updateX(pos,val)<<'\n';
        else cout<<updateY(pos,val)<<'\n';
    }
}
*/

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In member function 'void Interval_Tree::update(int, int, int, int)':
horses.cpp:26:40: warning: declaration of 'u' shadows a global declaration [-Wshadow]
   26 |     void update(int id,int l,int r,int u)
      |                                    ~~~~^
horses.cpp:22:29: note: shadowed declaration is here
   22 | int x[500005],y[500005],n,i,u,q,type,pos,val;
      |                             ^
horses.cpp: In member function 'pt Interval_Tree::get(int, int, int, int, int)':
horses.cpp:34:35: warning: declaration of 'u' shadows a global declaration [-Wshadow]
   34 |     pt get(int id,int l,int r,int u,int v)
      |                               ~~~~^
horses.cpp:22:29: note: shadowed declaration is here
   22 | int x[500005],y[500005],n,i,u,q,type,pos,val;
      |                             ^
horses.cpp: In function 'int Cal()':
horses.cpp:49:13: warning: declaration of 'u' shadows a global declaration [-Wshadow]
   49 |         int u=*it;
      |             ^
horses.cpp:22:29: note: shadowed declaration is here
   22 | int x[500005],y[500005],n,i,u,q,type,pos,val;
      |                             ^
horses.cpp:50:33: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   50 |         ll k=IT.get(1,1,n,u,last-1).y;
      |                             ~~~~^~
horses.cpp:57:12: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   57 |         if(ma>round(1e9)) break;
      |            ^~
horses.cpp:60:12: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   60 |     return res;
      |            ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:75:17: warning: declaration of 'u' shadows a global declaration [-Wshadow]
   75 | int updateX(int u,int k)
      |             ~~~~^
horses.cpp:22:29: note: shadowed declaration is here
   22 | int x[500005],y[500005],n,i,u,q,type,pos,val;
      |                             ^
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:84:17: warning: declaration of 'u' shadows a global declaration [-Wshadow]
   84 | int updateY(int u,int k)
      |             ~~~~^
horses.cpp:22:29: note: shadowed declaration is here
   22 | int x[500005],y[500005],n,i,u,q,type,pos,val;
      |                             ^

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