Submission #118933

#	Time	Username	Problem	Language	Result	Execution time	Memory
118933		TuGSGeReL	Horses (IOI15_horses)	C++14	34 / 100	23 ms	8320 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#define ll long long
#define mp make_pair
#define pub push_back
#define pob pop_back()
#define ss second
#define ff first
#define mt make_tuple
#define pof pop_front()
#define fbo find_by_order
#define ook order_of_key
#define lb lower_bound
#define ub upper_bound

typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
using pll = pair <ll, ll>;
using pii = pair <int, int>;

int mod = 1e9 + 7, ans[250001], n, terx[250001], tery[250001], sx[250001];
double mx[250001], sgx[250001], sgy[250001];

void upd(int node, int idx, int l, int r, int x, int y)
{
	if ( l > idx || r < idx )
		return;
	
	if ( l == r ) {
		if ( x != -1 ) {
			sgx[node] = log10(x);
			terx[node] = x;
		}
		
		if ( y != -1 ) {
			sgy[node] = log10(y);
			tery[node] = y;
		}
		
		sx[node] = terx[node];
		mx[node] = sgx[node] + sgy[node];
		ans[node] = (1ll * terx[node] * tery[node]) % mod;
		return;
	}
	
	int mid = (l + r) / 2;
	
	upd(node * 2, idx, l, mid, x, y);
	upd(node * 2 + 1, idx, mid + 1, r, x, y);
	
	sgx[node] = sgx[node * 2] + sgx[node * 2 + 1];
	sx[node] = (1ll * sx[node * 2] * sx[node * 2 + 1]) % mod;
	
	if ( mx[node * 2] > mx[node * 2 + 1] + sgx[node * 2] ) {
		mx[node] = mx[node * 2];
		ans[node] = ans[node * 2];
	} else {
		mx[node] = mx[node * 2 + 1] + sgx[node * 2];
		ans[node] = (1ll * ans[node * 2 + 1] * sx[node * 2]) % mod;
	}
}

int init(int N, int X[], int Y[]) {
	n = N;
		
	for (ll i = 0; i < N; i++)
		upd(1, i, 0, N - 1, X[i], Y[i]);
		
	return ans[1];
}

int updateX(int pos, int val) {
	upd(1, pos, 0, n - 1, val, -1);
	return ans[1];
}

int updateY(int pos, int val) {
	upd(1, pos, 0, n - 1, -1, val);
	return ans[1];
}

Compilation message (stderr)

horses.cpp: In function 'void upd(int, int, int, int, int, int)':
horses.cpp:46:47: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   ans[node] = (1ll * terx[node] * tery[node]) % mod;
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:56:53: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  sx[node] = (1ll * sx[node * 2] * sx[node * 2 + 1]) % mod;
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:63:56: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   ans[node] = (1ll * ans[node * 2 + 1] * sx[node * 2]) % mod;
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:71:33: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
   upd(1, i, 0, N - 1, X[i], Y[i]);
                                 ^

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