oj.uz

Submission #1041951

# Submission time Handle Problem Language Result Execution time Memory
1041951 2024-08-02T10:46:06 Z fv3 Horses (IOI15_horses) C++14
17 / 100
 248 ms 31116 KB 
#include <bits/stdc++.h>
#include "horses.h"

using namespace std;
typedef long long ll;

const ll mod = 1e9 + 7;
int N; vector<ll> X, Y;

int nt = 1;
vector<ll> st;
vector<ll> st_mod;

int mx_index = 0;

ll get_range(int l, int r, int k, int x, int y)
{
	if (y < l || x > r) return 1;
	if (x >= l && y <= r) return st[k];
	int c = (x + y) / 2;
	return get_range(l, r, k*2, x, c) * get_range(l, r, k*2|1, c+1, y);
}

ll get_mod_range(int l, int r, int k, int x, int y)
{
	if (y < l || x > r) return 1;
	if (x >= l && y <= r) return st_mod[k];
	int c = (x + y) / 2;
	return (get_mod_range(l, r, k*2, x, c) * get_mod_range(l, r, k*2|1, c+1, y)) % mod;
}

int get_full_max()
{
	ll res = (X[0] * Y[0]) % mod, cnt = X[0];
	mx_index = 0;

	for (int i = 1; i < N; i++)
	{
		cnt = (cnt * X[i]) % mod;
		ll last_mult = Y[mx_index];

		ll mult_range = get_range(mx_index + 1, i, 1, 0, nt - 1); 

		if (mult_range >= last_mult || mult_range * Y[i] >= last_mult)
		{
			res = (cnt * Y[i]) % mod;
			mx_index = i;
		}
	}

	return (int)res;
}

int get_max()
{
	int s = max(0, N - 31);
	mx_index = s;

	ll cnt = get_mod_range(0, s, 1, 0, nt - 1);
	ll res = (cnt * Y[s]) % mod;
	for (int i = s + 1; i < min(N - 1, s + 60); i++)
	{
		cnt = (cnt * X[i]) % mod;
		ll last_mult = Y[mx_index];

		ll mult_range = get_range(mx_index + 1, i, 1, 0, nt - 1); 

		if (mult_range >= last_mult || mult_range * Y[i] >= last_mult)
		{
			res = (cnt * Y[i]) % mod;
			mx_index = i;
		}
	}

	return res;
}

int init(int n, int x[], int y[]) 
{
	N = n;
	X.resize(N);
	Y.resize(N);

	for (int i = 0; i < N; i++)
	{
		X[i] = x[i];
		Y[i] = y[i];
	}

	while (nt < N) nt <<= 1;
	st = st_mod = vector<ll>(2 * nt, 1);
	for (int i = 0; i < N; i++)
	{
		st[nt + i] = X[i];
		st_mod[nt + i] = X[i];
	}
	for (int i = nt-1; i >= 1; i--)
	{
		st[i] = st[i*2] * st[i*2|1];
		st_mod[i] = (st_mod[i*2] * st_mod[i*2|1]) % mod;
	}

	return get_full_max();
}

int updateX(int pos, int val) 
{
	X[pos] = val;
	pos += nt;
	st[pos] = val;
	st_mod[pos] = val;

	for (pos /= 2; pos >= 1; pos /= 2)
	{
		st[pos] = st[pos*2] * st[pos*2|1];
		st_mod[pos] = (st_mod[pos*2] * st_mod[pos*2|1]) % mod;
	}

	return get_max();
}

int updateY(int pos, int val) 
{
	Y[pos] = val;
	return get_max();
}

Compilation message

horses.cpp: In function 'int get_max()':
horses.cpp:75:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   75 |  return res;
      |         ^~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 360 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 344 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 248 ms 31116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 352 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 356 KB Output is correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Halted 0 ms 0 KB -