Submission #1016316

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016316		ayankarimova	Horses (IOI15_horses)	C++14	100 / 100	126 ms	67156 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ll long long
const ll mod=1e9+7;
const ll sz=5e5+5;
struct d
{
    double sum, lpre;
    ll mul, pre;
};
d st[sz*4];
ll x[sz], y[sz], n;
double xl[sz], yl[sz];
d make(ll pos)
{
    d cur;
    cur.sum=xl[pos];
    cur.mul=x[pos];
    cur.lpre=xl[pos]+yl[pos];
    cur.pre=((x[pos]%mod)*(y[pos]%mod))%mod;
    return cur;
}
void mrg(d a, d b, d &c)
{
    c.sum=a.sum+b.sum;
    c.mul=((a.mul%mod)*(b.mul%mod))%mod;
    if(a.lpre>a.sum+b.lpre){
        c.lpre=a.lpre;
        c.pre=a.pre;
    }
    else{
        c.lpre=a.sum+b.lpre;
        c.pre=((a.mul%mod)*(b.pre%mod)%mod);
    }
}
void build(ll l, ll r, ll in)
{
    if(l==r){
        st[in]=make(l);
        return;
    }
    ll mid=(l+r)/2;
    build(l, mid, in*2);
    build(mid+1, r, in*2+1);
    mrg(st[in*2], st[in*2+1], st[in]);
}
void update(ll l, ll r, ll in, ll pos)
{
    if(l==r){
        st[in]=make(l);
        return;
    }
    ll mid=(l+r)/2;
    if(pos<=mid){
        update(l, mid, in*2, pos);
    }
    else{
        update(mid+1, r, in*2+1, pos);
    }
    mrg(st[in*2], st[in*2+1], st[in]);
}
int init(int N, int X[], int Y[]) {

    ll num=1, ans=0;
    n=N;
    for(int i=0; i<n; i++){
        x[i+1]=(X[i]);
        y[i+1]=(Y[i]);
        xl[i+1]=log10(X[i]);
        yl[i+1]=log10(Y[i]);
    }
    build(1, n, 1);
	return st[1].pre;
}
int updateX(int pos, int val) {

    pos++;
    x[pos]=val;
    xl[pos]=log10(val);
    update(1, n, 1, pos);
	return st[1].pre;
}
int updateY(int pos, int val) {

	pos++;
    y[pos]=val;
    yl[pos]=log10(val);
    update(1, n, 1, pos);
	return st[1].pre;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:75:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   75 |  return st[1].pre;
      |         ~~~~~~^~~
horses.cpp:66:8: warning: unused variable 'num' [-Wunused-variable]
   66 |     ll num=1, ans=0;
      |        ^~~
horses.cpp:66:15: warning: unused variable 'ans' [-Wunused-variable]
   66 |     ll num=1, ans=0;
      |               ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:83:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   83 |  return st[1].pre;
      |         ~~~~~~^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:91:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   91 |  return st[1].pre;
      |         ~~~~~~^~~

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