Submission #957821

#	Time	Username	Problem	Language	Result	Execution time	Memory
957821		ono_de206	Mađioničar (COI22_madionicar)	C++14	100 / 100	1079 ms	852 KiB

Main

#include<bits/stdc++.h>
using namespace std;

#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

// #define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
// typedef pair<int, int> P;

template<typename T, typename U>
ostream & operator << (ostream &out, const pair<T, U> &c) {
	out << c.first << ' ' << c.second;
	return out;
}

template<typename T>
ostream & operator << (ostream &out, vector<T> &v) {
	const int sz = v.size();
	for (int i = 0; i < sz; i++) {
		if (i) out << ' ';
		out << v[i];
	}
	return out;
}

template<typename T>
istream & operator >> (istream &in, vector<T> &v) {
	for (T &x : v) in >> x;
	return in;
}

template<typename T, typename U>
	istream & operator >> (istream &in, pair<T, U> &c) {
	in >> c.first;
	in >> c.second;
	return in;
}

template<typename T>
void mxx(T &a, T b){if(b > a) a = b;}
template<typename T>
void mnn(T &a, T b){if(b < a) a = b;}

const int mxn = 1e5 + 10, MXLOG = 22, mod = 1e9 + 7, P = 1181, D = 1523, N = 2500;
const long long inf = 2e18 + 10;
int p[mxn];

int ask(int l, int r) {
	cout << "? " << l << ' ' << r << endl;
	int res;
	cin >> res;
	return res;
}

void go() {
	int n;
	cin >> n;
	int odd = 0, even = 0;
	for(int i = 1; i <= n; i++) {
		while(i - odd - 1 >= 1 && i + odd + 1 <= n && ask(i - odd - 1, i + odd + 1) == 1) odd++;
		while(i - even >= 1 && i + even + 1 <= n && ask(i - even, i + even + 1) == 1) even++;
	}
	cout << "! " << max(odd * 2 + 1, even * 2) << endl;
}

signed main() {
	fast;
	int t = 1;
	// cin >> t;
	while(t--) {
		go();
	}
	return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37