Submission #590014

#	Time	Username	Problem	Language	Result	Execution time	Memory
590014		alirezasamimi100	Horses (IOI15_horses)	C++17	37 / 100	572 ms	44804 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define lc v<<1
#define rc v<<1|1
using ll = long long int;
using namespace std;
const int MOD = 1000000007, MN = 5e5 + 10;

ll pow(ll x, ll y, ll mod){
    ll ans=1;
    while (y != 0) {
        if (y & 1) ans = ans * x % mod;
        y >>= 1;
        x = x * x % mod;
    }
    return ans;
}

ll f[MN*4],g[MN],RX[MN];
int n;
set<int> st;

void update(int v, int l, int r, int p, ll x){
    if(r-l==1){
        f[v]=x;
        return;
    }
    int m=(l+r)>>1;
    if(p<m) update(lc,l,m,p,x);
    else update(rc,m,r,p,x);
    f[v]=max(f[lc],f[rc]);
}

ll get(int v, int l, int r, int tl, int tr){
    if(l>=tr || tl>=r || tl>=tr) return 0;
    if(l>=tl && r<=tr) return f[v];
    int m=(l+r)>>1;
    return max(get(lc,l,m,tl,tr),get(rc,m,r,tl,tr));
}

void upd(int t, ll x){
    for(t+=5; t<MN; t+=t&-t) g[t]=g[t]*x%MOD;
}

ll gt(int t, ll x=1){
    for(t+=5; t; t-=t&-t) x=x*g[t]%MOD;
    return x;
}

int init(int N, int X[], int Y[]) {
    n=N;
    for(ll i=0; i<MN; i++) g[i]=1;
    for(int i=0; i<N; i++){
        update(1,0,n,i,Y[i]);
        upd(i,X[i]);
        RX[i]=X[i];
        if(X[i]>1) st.insert(-i);
    }
    ll ans=0,k=-1;
    for(int t : st){
        if(ans>(ll)1e9) break;
        t=-t;
        k=t;
        ans=max(ans,get(1,0,n,t,n));
        ans*=RX[t];
    }
	if(k==-1) return f[1];
    return ans%MOD*gt(k-1)%MOD;
}

int updateX(int pos, int val) {
    ll x=pow(RX[pos],MOD-2,MOD)*val%MOD;
    upd(pos,x);
    RX[pos]=val;
    if(val>1) st.insert(-pos);
    else st.erase(-pos);
    ll ans=0,k=-1;
    for(int t : st){
        if(ans>(ll)1e9) break;
        t=-t;
        k=t;
        ans=max(ans,get(1,0,n,t,n));
        ans*=RX[t];
    }
	if(k==-1) return f[1];
    return ans%MOD*gt(k-1)%MOD;
}

int updateY(int pos, int val) {
    update(1,0,n,pos,val);
    ll ans=0,k=-1;
    for(int t : st){
        if(ans>(ll)1e9) break;
        t=-t;
        k=t;
        ans=max(ans,get(1,0,n,t,n));
        ans*=RX[t];
    }
	if(k==-1) return f[1];
    return ans%MOD*gt(k-1)%MOD;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:67:22: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   67 |  if(k==-1) return f[1];
      |                   ~~~^
horses.cpp:68:24: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   68 |     return ans%MOD*gt(k-1)%MOD;
      |                       ~^~
horses.cpp:68:27: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   68 |     return ans%MOD*gt(k-1)%MOD;
      |            ~~~~~~~~~~~~~~~^~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:85:22: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   85 |  if(k==-1) return f[1];
      |                   ~~~^
horses.cpp:86:24: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   86 |     return ans%MOD*gt(k-1)%MOD;
      |                       ~^~
horses.cpp:86:27: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   86 |     return ans%MOD*gt(k-1)%MOD;
      |            ~~~~~~~~~~~~~~~^~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:99:22: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   99 |  if(k==-1) return f[1];
      |                   ~~~^
horses.cpp:100:24: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  100 |     return ans%MOD*gt(k-1)%MOD;
      |                       ~^~
horses.cpp:100:27: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  100 |     return ans%MOD*gt(k-1)%MOD;
      |            ~~~~~~~~~~~~~~~^~~~

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