#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, sk = 0;
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)];
sk ++;
if(sk > 300)
{
while(1 > 0)
sk ++;
}
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, 1ll); 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);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Incorrect |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
284 KB |
Output is correct |
| 2 |
Correct |
3 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
320 KB |
Output is correct |
| 2 |
Correct |
2 ms |
320 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
256 KB |
Incorrect |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
256 KB |
Incorrect |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
384 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
384 KB |
Incorrect |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
256 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
384 KB |
Incorrect |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
384 KB |
Output is correct |
| 2 |
Correct |
4 ms |
384 KB |
Output is correct |
| 3 |
Correct |
2 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
320 KB |
Output is correct |
| 2 |
Correct |
3 ms |
256 KB |
Output is correct |
| 3 |
Incorrect |
3 ms |
384 KB |
Incorrect |
