oj.uz

Submission #1017821

# Submission time Handle Problem Language Result Execution time Memory
1017821 2024-07-09T10:28:23 Z Gray Colors (BOI20_colors) C++17
0 / 100
 1 ms 344 KB 
#include <cassert>
#include <iostream>
#include <set>
#include <vector>
#define ll long long
#define ln "\n"
#define ff first
#define ss second
#define ull unsigned ll
#define ld long double
const ll INF = 1e9;
const ll MOD = 1e9+7;
using namespace std;

void solve(){
	ll n; cin >> n;
	vector<bool> usd(n+1);
	ll l=0, r=n;
	vector<ll> moves;
	while (l+1<r) moves.push_back((r+l)/2), l=(r+l)/2;
	ll sp=1;
	for (ll i=moves.size()-1; i>=0; i--){
		if (sp+moves[i]<=n) sp+=moves[i];
		else sp-=moves[i];
	}
	usd[sp]=1;
	cout << "? " << sp << endl; ll _; cin >> _;
	l=0, r=n; ll lp=sp;
	while (l+1<r){
		ll mid = (l+r)/2;
		if (lp-mid>=0 and !usd[lp-mid]){
			lp=lp-mid;
			cout << "? " << lp << endl;
		}else{
			lp=lp+mid;
			cout << "? " << lp << endl;
		}
		usd[lp]=1;
		ll x; cin >> x;
		if (x) r=mid;
		else l=mid;
	}
	cout << "= " << r << endl;
}
// 123456789
// #.####.#.
void setIO(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
}
int main(){
	setIO();
	ll t=1;
	// cin >> t;
	while (t--) solve();
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Correct 1 ms 344 KB OK (7 queries)
3 Correct 0 ms 344 KB OK (4 queries)
4 Correct 0 ms 344 KB OK (5 queries)
5 Correct 0 ms 344 KB OK (5 queries)
6 Correct 0 ms 344 KB OK (7 queries)
7 Correct 0 ms 344 KB OK (7 queries)
8 Correct 1 ms 344 KB OK (6 queries)
9 Correct 0 ms 344 KB OK (7 queries)
10 Runtime error 0 ms 344 KB Execution killed with signal 13
11 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Correct 1 ms 344 KB OK (7 queries)
3 Correct 0 ms 344 KB OK (4 queries)
4 Correct 0 ms 344 KB OK (5 queries)
5 Correct 0 ms 344 KB OK (5 queries)
6 Correct 0 ms 344 KB OK (7 queries)
7 Correct 0 ms 344 KB OK (7 queries)
8 Correct 1 ms 344 KB OK (6 queries)
9 Correct 0 ms 344 KB OK (7 queries)
10 Runtime error 0 ms 344 KB Execution killed with signal 13
11 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Correct 1 ms 344 KB OK (7 queries)
3 Correct 0 ms 344 KB OK (4 queries)
4 Correct 0 ms 344 KB OK (5 queries)
5 Correct 0 ms 344 KB OK (5 queries)
6 Correct 0 ms 344 KB OK (7 queries)
7 Correct 0 ms 344 KB OK (7 queries)
8 Correct 1 ms 344 KB OK (6 queries)
9 Correct 0 ms 344 KB OK (7 queries)
10 Runtime error 0 ms 344 KB Execution killed with signal 13
11 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Correct 1 ms 344 KB OK (7 queries)
3 Correct 0 ms 344 KB OK (4 queries)
4 Correct 0 ms 344 KB OK (5 queries)
5 Correct 0 ms 344 KB OK (5 queries)
6 Correct 0 ms 344 KB OK (7 queries)
7 Correct 0 ms 344 KB OK (7 queries)
8 Correct 1 ms 344 KB OK (6 queries)
9 Correct 0 ms 344 KB OK (7 queries)
10 Runtime error 0 ms 344 KB Execution killed with signal 13
11 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB OK (4 queries)
2 Correct 1 ms 344 KB OK (7 queries)
3 Correct 0 ms 344 KB OK (4 queries)
4 Correct 0 ms 344 KB OK (5 queries)
5 Correct 0 ms 344 KB OK (5 queries)
6 Correct 0 ms 344 KB OK (7 queries)
7 Correct 0 ms 344 KB OK (7 queries)
8 Correct 1 ms 344 KB OK (6 queries)
9 Correct 0 ms 344 KB OK (7 queries)
10 Runtime error 0 ms 344 KB Execution killed with signal 13
11 Halted 0 ms 0 KB -