oj.uz

Submission #106672

# Submission time Handle Problem Language Result Execution time Memory
106672 2019-04-19T15:21:57 Z SOIVIEONE Aliens (IOI07_aliens) C++14
30 / 100
 4 ms 408 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define INF 1000000021
#define MOD 1000000007
#define pb push_back
#define sqr(a) (a)*(a)
#define M(a, b) make_pair(a,b)
#define F first
#define S second
#define all(x) (x.begin(), x.end())
#define deb(x) cerr << #x << " = " << x << '\n'
#define N 222222

using namespace std;
using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

const ld pi = 2 * acos(0.0);
template<class T> bool umin(T& a, T b){if(a>b){a=b;return 1;}return 0;}
template<class T> bool umax(T& a, T b){if(a<b){a=b;return 1;}return 0;}
template<class T, class TT> bool pal(T a, TT n){int k=0;for(int i=0;i<=n/2;i++){if(a[i]!=a[n-i-1]){k=1;break;}}return k?0:1;}

//int month[] = {0,31,28,31,30,31,30,31,31,30,31,30,31};

map<pll, bool> mp;
ll n;
bool ask(ll x, ll y)
{
	if(x < 0 || x > n || y < 0 || y > n)
		return 0;
	if(mp.count(M(x, y)))
		return mp[M(x, y)];
	cout << "examine " << x << ' ' << y << '\n';
	cout.flush();
	string q;
	cin >> q;
	return mp[M(x, y)] = (q[0] == 't');
}

int main()
{
	ll x, y;
	cin >> n >> x >> y;
	ll p = 1;
	while(p + x <= n && ask(x + p, y))
		p *= 2ll;
	ll l = x + p/2, r = min(x + p, n), hr = 0;
	for(int i = 1; i <= 40; i ++)
	{
		ll m = (l + r) >> 1ll;
		if(ask(m, y))
		{
			l = m + 1;
			hr = m;
		}
		else
			r = m;
	}
	p = 1;
	while(x - p >= 0 && ask(x - p, y))
		p *= 2ll;
	l = max(x - p, 0ll); r = x - p/2;
	ll hl = 0;
	
	for(int i = 1; i <= 40; i ++)
	{
		ll m = (l + r) >> 1l;;
		if(!ask(m, y))
		{
			l = m + 1;
			hl = m;
		}
		else
			r = m;
	}
	hl ++;
	ll mm = hr - hl + 1;
	p = 1;
	while(y + p <= n && ask(x, y + p))
		p *= 2ll;
	l = y + p/2; r = min(y + p, n); ll v = 0;
	for(int i = 1; i <= 40; i ++)
	{
		ll m = (l + r) >> 1ll;
		if(ask(x, m))
		{
			l = m + 1;
			v = m;
		}
		else
			r = m;
	}
	ll up = v;
	while(ask(x, up+mm+mm))
		up += mm+mm;
	ll left = hl;
	while(ask(left-mm-mm, y))
		left -= (mm + mm);
	ll right = left + 5*mm-1;
	ll down = up - 5*mm+1;
	cout << "solution " << (left+right)/2 << ' ' << (up + down)/2 << '\n';
	cout.flush();
	


	return 0;
	//ios::sync_with_stdio(false);
	//cin.tie(0);
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Incorrect 3 ms 256 KB Incorrect

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 304 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 404 KB Output is correct
2 Correct 3 ms 408 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Incorrect 3 ms 256 KB Incorrect

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Incorrect 2 ms 256 KB Incorrect

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 304 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Incorrect 3 ms 256 KB Incorrect
3 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Incorrect 3 ms 256 KB Incorrect
3 Halted 0 ms 0 KB -

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 320 KB Output is correct
2 Correct 4 ms 304 KB Output is correct
3 Correct 3 ms 384 KB Output is correct

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Incorrect 3 ms 384 KB Incorrect