oj.uz

Submission #16555

# Submission time Handle Problem Language Result Execution time Memory
16555 2015-08-27T15:09:51 Z gs14004 Horses (IOI15_horses) C++14
0 / 100
 88 ms 25444 KB 
#include "horses.h"
#include <algorithm>
#include <set>
using namespace std;
const int mod = 1e9 + 7;
typedef long long lint;
typedef pair<int,int> pi;

struct rmq{
	pi tree[1050000];
	int lim;
	void init(int n, int *a){
		for(lim = 1; lim <= n; lim <<= 1);
		for(int i=0; i<n; i++){
			tree[i + lim] = pi(a[i], i);
		}
		for(int i=lim-1; i; i--){
			tree[i] = max(tree[2*i], tree[2*i+1]);
		}
	}
	void upd(int x, int v){
		x += lim;
		tree[x] = pi(v, x - lim);
		while(x > 1){
			x >>= 1;
			tree[x] = max(tree[2*x], tree[2*x+1]);
		}
	}
	pi q(int s, int e){
		s += lim;
		e += lim;
		pi ret(0,0);
		while(s < e){
			if(s%2 == 1) ret = max(ret,tree[s++]);
			if(e%2 == 0) ret = max(ret,tree[e--]);
			s >>= 1;
			e >>= 1;
		}
		if(s == e) ret = max(ret,tree[s]);
		return ret;
	}
}rmq;

struct gob{
	lint tree[1050000], lim;
	void init(int n, int *a){
		for(lim = 1; lim <= n; lim <<= 1);
		fill(tree, tree + 2 * lim + 1, 1);
		for(int i=0; i<n; i++){
			tree[i + lim] = a[i];
		}
		for(int i=lim-1; i; i--){
			tree[i] = tree[2*i] * tree[2*i+1] % mod;
		}
	}
	void upd(int x, int v){
		x += lim;
		tree[x] = v;
		while(x > 1){
			x >>= 1;
			tree[x] = tree[2*x] * tree[2*x+1] % mod;
		}
	}
	int q(int s, int e){
		s += lim;
		e += lim;
		lint ret = 1;
		while(s < e){
			if(s%2 == 1) ret *= tree[s++], ret %= mod;
			if(e%2 == 0) ret *= tree[e--], ret %= mod;
			s >>= 1;
			e >>= 1;
		}
		if(s == e) ret *= tree[s], ret %= mod;
		return ret;
	}
}gob;

int n, x[500005], y[500005];

set<int> s;

int solve(){
	auto ite = --s.end();
	auto its = --s.end();
	its--;
	lint ret = -1;
	int retp = n;
	for(int i=0; i<32 && ite != s.begin(); i++){
		pi t = rmq.q(*its, *ite - 1);
		if(ret < t.first){
			retp = t.second;
			ret = t.first;
		}
		ret *= x[*its];
		if(ret > 2e9 || its == s.begin()) break;
		its--;
		ite--;
	}
	return 1ll * gob.q(0, retp) * y[retp] % mod;
}

int init(int N, int X[], int Y[]) {
	n = N;
	gob.init(N, X);
	rmq.init(N, Y);
	for(int i=0; i<N; i++){
		x[i] = X[i], y[i] = Y[i];
		if(Y[i] != 1) s.insert(i);
	}
	s.insert(0);
	s.insert(N);
	return solve();
}

int updateX(int pos, int val) {
	x[pos] = val;
	gob.upd(pos, val);
	return solve();
}

int updateY(int pos, int val) {
	rmq.upd(pos, val);
	if(y[pos] != 1){
		s.erase(pos);
		s.insert(0);
	}
	y[pos] = val;
	if(y[pos] != 1){
		s.insert(pos);
	}
	return solve();
}

Subtask #1
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 21532 KB Output is correct
2 Correct 0 ms 21532 KB Output is correct
3 Correct 3 ms 21532 KB Output is correct
4 Correct 0 ms 21532 KB Output is correct
5 Correct 0 ms 21532 KB Output is correct
6 Correct 0 ms 21532 KB Output is correct
7 Correct 3 ms 21532 KB Output is correct
8 Correct 0 ms 21532 KB Output is correct
9 Correct 3 ms 21532 KB Output is correct
10 Correct 0 ms 21532 KB Output is correct
11 Correct 0 ms 21532 KB Output is correct
12 Correct 0 ms 21532 KB Output is correct
13 Correct 0 ms 21532 KB Output is correct
14 Correct 0 ms 21532 KB Output is correct
15 Correct 0 ms 21532 KB Output is correct
16 Correct 0 ms 21532 KB Output is correct
17 Correct 0 ms 21532 KB Output is correct
18 Incorrect 0 ms 21532 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #2
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 21532 KB Output is correct
2 Correct 0 ms 21532 KB Output is correct
3 Correct 3 ms 21532 KB Output is correct
4 Correct 4 ms 21532 KB Output is correct
5 Correct 0 ms 21532 KB Output is correct
6 Correct 0 ms 21532 KB Output is correct
7 Correct 0 ms 21532 KB Output is correct
8 Correct 3 ms 21532 KB Output is correct
9 Correct 4 ms 21532 KB Output is correct
10 Correct 0 ms 21532 KB Output is correct
11 Correct 0 ms 21532 KB Output is correct
12 Correct 0 ms 21532 KB Output is correct
13 Correct 0 ms 21532 KB Output is correct
14 Correct 0 ms 21532 KB Output is correct
15 Correct 3 ms 21532 KB Output is correct
16 Correct 0 ms 21532 KB Output is correct
17 Correct 0 ms 21532 KB Output is correct
18 Incorrect 4 ms 21532 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #3
0.0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 88 ms 25444 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 21532 KB Output is correct
2 Correct 4 ms 21532 KB Output is correct
3 Correct 0 ms 21532 KB Output is correct
4 Correct 3 ms 21532 KB Output is correct
5 Correct 0 ms 21532 KB Output is correct
6 Correct 3 ms 21532 KB Output is correct
7 Correct 0 ms 21532 KB Output is correct
8 Correct 0 ms 21532 KB Output is correct
9 Correct 0 ms 21532 KB Output is correct
10 Correct 0 ms 21532 KB Output is correct
11 Correct 0 ms 21532 KB Output is correct
12 Correct 0 ms 21532 KB Output is correct
13 Correct 4 ms 21532 KB Output is correct
14 Correct 0 ms 21532 KB Output is correct
15 Correct 3 ms 21532 KB Output is correct
16 Correct 0 ms 21532 KB Output is correct
17 Correct 0 ms 21532 KB Output is correct
18 Incorrect 3 ms 21532 KB Output isn't correct
19 Halted 0 ms 0 KB -

Subtask #5
0.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 21532 KB Output is correct
2 Correct 0 ms 21532 KB Output is correct
3 Correct 3 ms 21532 KB Output is correct
4 Correct 0 ms 21532 KB Output is correct
5 Correct 0 ms 21532 KB Output is correct
6 Correct 0 ms 21532 KB Output is correct
7 Correct 3 ms 21532 KB Output is correct
8 Correct 3 ms 21532 KB Output is correct
9 Correct 0 ms 21532 KB Output is correct
10 Correct 3 ms 21532 KB Output is correct
11 Correct 0 ms 21532 KB Output is correct
12 Correct 5 ms 21532 KB Output is correct
13 Correct 0 ms 21532 KB Output is correct
14 Correct 0 ms 21532 KB Output is correct
15 Correct 0 ms 21532 KB Output is correct
16 Correct 3 ms 21532 KB Output is correct
17 Correct 3 ms 21532 KB Output is correct
18 Incorrect 3 ms 21532 KB Output isn't correct
19 Halted 0 ms 0 KB -