Submission #461157

#	Time	Username	Problem	Language	Result	Execution time	Memory
461157		zaneyu	Horses (IOI15_horses)	C++14	17 / 100	1000 ms	19536 KiB

horses

/*input
3 
2 1 3
3 4 1
1
2 1 2
*/
#include "horses.h"
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less<long long>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
using ll = long long;
using ld = long double;
using pii = pair<ll,ll>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
const ll INF64=4e18;
const ll INF=0x3f3f3f3f;
const ll MOD=1e9+7;
const ld PI=acos(-1);
const ld eps=1e-6;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
ll sub(ll a,ll b){
    ll x=a-b;
    while(x<0) x+=MOD;
    while(x>MOD) x-=MOD;
    return x;
}
ll mult(ll a,ll b){
    return (a*b)%MOD;
}
ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=(res*a)%MOD;
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
const int maxn=5e5+5;
const ll maxlg=__lg(maxn)+2;
int val[4*maxn],md[4*maxn];
inline void mdf(int idx,int l,int r,int p,int x){
    if(l>p or r<p) return;
    if(l==r){
        val[idx]=md[idx]=x;
        return;
    }
    int mid=(l+r)/2;
    mdf(idx*2,l,mid,p,x);
    mdf(idx*2+1,mid+1,r,p,x);
    val[idx]=min((ll)INF,(ll)val[idx*2]*val[idx*2+1]);
    md[idx]=mult(md[idx*2],md[idx*2+1]);
}
inline int qv(int idx,int l,int r,int ql,int qr){
    if(l>qr or r<ql) return 1;
    if(ql<=l and r<=qr) return val[idx];
    int mid=(l+r)/2;
    return min((ll)INF,(ll)qv(idx*2,l,mid,ql,qr)*qv(idx*2+1,mid+1,r,ql,qr));
}
inline int qm(int idx,int l,int r,int ql,int qr){
    if(l>qr or r<ql) return 1;
    if(ql<=l and r<=qr) return md[idx];
    int mid=(l+r)/2;
    return mult(qm(idx*2,l,mid,ql,qr),qm(idx*2+1,mid+1,r,ql,qr)); 
}
int opt[4*maxn];
int y[maxn],n;
void build(int idx,int l,int r){
    if(l==r){
        opt[idx]=l;
        return;
    }
    int mid=(l+r)/2;
    build(idx*2,l,mid);
    build(idx*2+1,mid+1,r);
}
void upd(int idx,int l,int r,int p){
    if(r<p or l>p) return;
    if(l==r){
        return;
    }
    int mid=(l+r)/2;
    upd(idx*2,l,mid,p);
    upd(idx*2+1,mid+1,r,p);
    if(y[opt[idx*2+1]]*qv(1,0,n-1,opt[idx*2]+1,opt[idx*2+1])>=y[opt[idx*2]]) opt[idx]=opt[idx*2+1];
    else opt[idx]=opt[idx*2];
}
int init(int N, int X[], int Y[]) {
    n=N;
    REP(i,n) mdf(1,0,n-1,i,X[i]);
    build(1,0,n-1);
    REP(i,n) y[i]=Y[i],upd(1,0,n-1,i);
    return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
}

int updateX(int pos, int val) { 
    mdf(1,0,n-1,pos,val);
    upd(1,0,n-1,pos);
    return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
}

int updateY(int pos, int val) {
    y[pos]=val;
    upd(1,0,n-1,pos);
    return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
}

Compilation message (stderr)

horses.cpp: In function 'void mdf(int, int, int, int, int)':
horses.cpp:69:17: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   69 |     val[idx]=min((ll)INF,(ll)val[idx*2]*val[idx*2+1]);
      |              ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp:70:17: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   70 |     md[idx]=mult(md[idx*2],md[idx*2+1]);
      |             ~~~~^~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int qv(int, int, int, int, int)':
horses.cpp:76:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   76 |     return min((ll)INF,(ll)qv(idx*2,l,mid,ql,qr)*qv(idx*2+1,mid+1,r,ql,qr));
      |            ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int qm(int, int, int, int, int)':
horses.cpp:82:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   82 |     return mult(qm(idx*2,l,mid,ql,qr),qm(idx*2+1,mid+1,r,ql,qr));
      |            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:111:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  111 |     return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
      |            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:114:26: warning: declaration of 'val' shadows a global declaration [-Wshadow]
  114 | int updateX(int pos, int val) {
      |                      ~~~~^~~
horses.cpp:59:5: note: shadowed declaration is here
   59 | int val[4*maxn],md[4*maxn];
      |     ^~~
horses.cpp:117:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  117 |     return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
      |            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:120:26: warning: declaration of 'val' shadows a global declaration [-Wshadow]
  120 | int updateY(int pos, int val) {
      |                      ~~~~^~~
horses.cpp:59:5: note: shadowed declaration is here
   59 | int val[4*maxn],md[4*maxn];
      |     ^~~
horses.cpp:123:16: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  123 |     return mult(y[opt[1]],qm(1,0,n-1,0,opt[1]));
      |            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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