oj.uz

Submission #1000324

# Submission time Handle Problem Language Result Execution time Memory
1000324 2024-06-17T08:49:39 Z jer033 Horses (IOI15_horses) C++17
34 / 100
 1500 ms 17332 KB 
#include "horses.h"
#include <bits/stdc++.h>
using ll = long long;
using namespace std;
const ll MOD = 1'000'000'007;
const ll INF = 1'000'000'006;
const int pus = 524288;
 
ll regmul(ll a, ll b)
{
	return (a*b)%MOD;
}
 
ll boundmul(ll a, ll b)
{
	return min(INF, a*b);
}
 
ll modpow(ll x, int y)
{
	if (y==0)
		return 1;
	if (y==1)
		return x;
	ll z = modpow(x, y/2);
	z = regmul(z, z);
	if (y%2)
		z = regmul(z, x);
	return z;
}
 
ll modinv(ll a, ll b)
{
	return regmul(a, modpow(b, MOD-2));
}
 
vector<int> x;
vector<int> y;
int n;
 
int segtree[1048576];
 
void setupsegtree()
{
	for (int i=0; i<n; i++)
	{
		segtree[pus+i] = y[i];
	}
	for (int i=pus-1; i>=1; i--)
	{
		segtree[i] = max(segtree[2*i], segtree[2*i+1]);
	}
}
 
void updatesegtree(int index, int newval)
{
	index = pus+index;
	segtree[index] = newval;
	while (index!=0)
	{
		index = index/2;
		segtree[index] = max(segtree[2*index], segtree[2*index+1]);
	}
	segtree[0] = 0;
}
 
int rangequery(int indexa, int indexb)
{
	indexa = indexa+pus;
	indexb = indexb+pus;
	int ans = -1;
	while ((indexb-indexa)>=5)
	{
		if ((indexa%2)==1)
		{
			ans = max(segtree[indexa], ans);
			indexa++;
		}
		if ((indexb%2)==0)
		{
			ans = max(segtree[indexb], ans);
			indexb--;
		}
		indexa = indexa/2;
		indexb = indexb/2;
	}
	for (int i=indexa; i<=indexb; i++)
		ans = max(segtree[i], ans);
	return ans;
}
 
priority_queue<int> nonone;
vector<int> candidates;
vector<int> mybes;
ll c;
 
void initpq()
{
	while (not nonone.empty())
		nonone.pop();
	candidates.clear();
	mybes.clear();
	c = 1;
	for (int i=0; i<n; i++)
	{
		if (x[i]>1)
		{
			nonone.push(i);
			c = regmul(c, x[i]);
		}
	}
	int j = 0;
	while ((j<30) and (not nonone.empty()))
	{
		candidates.push_back(nonone.top());
		c = modinv(c, x[nonone.top()]);
		nonone.pop();
		j++;
	}
	//reverse the list
	vector<int> newcandidates;
	for (int i=j-1; i>=0; i--)
	{
		newcandidates.push_back(candidates[i]);
	}
	candidates = newcandidates;
 
	for (int i=0; i<j; i++)
	{
		if (i!=(j-1))
		{
			mybes.push_back(rangequery(candidates[i], candidates[i+1]-1));
		}
		else
		{
			mybes.push_back(rangequery(candidates[i], n-1));
		}
	}
}
 
ll solve()
{
	int m = candidates.size();
	if (m==0)
		return rangequery(0, n-1);
	ll safe = x[candidates[0]];
	ll bes = mybes[0];
	ll currmul = 1;
	for (int i=1; i<m; i++)
	{
		if (boundmul(boundmul(currmul, x[candidates[i]]), mybes[i])>=bes)
		{
			safe = regmul(safe, currmul);
			safe = regmul(safe, x[candidates[i]]);
			currmul = 1;
			bes = mybes[i];
		}
		else
		{
			currmul = boundmul(currmul, x[candidates[i]]);
		}
	}
	ll doubans = regmul(c, regmul(safe, bes));
	return modinv(doubans, 2);
}
 
int init(int N, int X[], int Y[]) {
	x.push_back(2);
	y.push_back(1);
	for (int i=0; i<N; i++)
	{
		x.push_back(X[i]);
		y.push_back(Y[i]);
	}
	n=N+1;
	setupsegtree();
    initpq();
	return solve();
}
 
int updateX(int pos, int val) {	
	pos++;
	x[pos] = val;
	setupsegtree();
	initpq();
	return solve();
}
 
int updateY(int pos, int val) {
	pos++;
	y[pos] = val;
	setupsegtree();
	initpq();
	/*
	updatesegtree(pos, val);
	int j = candidates.size();
	for (int i=0; i<j; i++)
	{
		if (i!=(j-1))
		{
			if ((candidates[i]<=pos) and (pos<candidates[i+1]))
				mybes[i] = rangequery(candidates[i], candidates[i+1]-1);
		}
		else
		{
			if (candidates[i]<=pos)
				mybes[i] = rangequery(candidates[i], n-1);
		}
	}*/
 
	return solve();
}

Compilation message

horses.cpp: In function 'll solve()':
horses.cpp:143:25: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
  143 |  int m = candidates.size();
      |          ~~~~~~~~~~~~~~~^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:178:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  178 |  return solve();
      |         ~~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:186:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  186 |  return solve();
      |         ~~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:211:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
  211 |  return solve();
      |         ~~~~~^~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2648 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2648 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2500 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 1 ms 2500 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 2 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2648 KB Output is correct
5 Correct 1 ms 2904 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2500 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2500 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 3 ms 2652 KB Output is correct
22 Correct 7 ms 2676 KB Output is correct
23 Correct 363 ms 2692 KB Output is correct
24 Correct 388 ms 2688 KB Output is correct
25 Correct 374 ms 2712 KB Output is correct
26 Correct 417 ms 2648 KB Output is correct
27 Correct 358 ms 2652 KB Output is correct
28 Correct 415 ms 2540 KB Output is correct
29 Correct 352 ms 2652 KB Output is correct
30 Correct 366 ms 2652 KB Output is correct
31 Correct 346 ms 2684 KB Output is correct
32 Correct 379 ms 2688 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1568 ms 15296 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 2 ms 2652 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2496 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 3 ms 2652 KB Output is correct
22 Correct 7 ms 2672 KB Output is correct
23 Correct 360 ms 2704 KB Output is correct
24 Correct 365 ms 2700 KB Output is correct
25 Correct 376 ms 2648 KB Output is correct
26 Correct 384 ms 2716 KB Output is correct
27 Correct 353 ms 2652 KB Output is correct
28 Correct 375 ms 2900 KB Output is correct
29 Correct 339 ms 2648 KB Output is correct
30 Correct 372 ms 2900 KB Output is correct
31 Correct 360 ms 2652 KB Output is correct
32 Correct 363 ms 2900 KB Output is correct
33 Execution timed out 1564 ms 16564 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2652 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 3 ms 2652 KB Output is correct
22 Correct 7 ms 2676 KB Output is correct
23 Correct 360 ms 2688 KB Output is correct
24 Correct 355 ms 2648 KB Output is correct
25 Correct 384 ms 2648 KB Output is correct
26 Correct 377 ms 2648 KB Output is correct
27 Correct 364 ms 2648 KB Output is correct
28 Correct 366 ms 2648 KB Output is correct
29 Correct 349 ms 2648 KB Output is correct
30 Correct 370 ms 2652 KB Output is correct
31 Correct 361 ms 2940 KB Output is correct
32 Correct 365 ms 2708 KB Output is correct
33 Execution timed out 1583 ms 17332 KB Time limit exceeded
34 Halted 0 ms 0 KB -