제출 #595683

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
595683		NekoRolly	Aliens (IOI07_aliens)	C++17	0 / 100	0 ms	208 KiB

aliens

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

ll n,x,y,M;
ll Lx,Rx,Ly,Ry;
ll l,r;

bool Query(ll m,bool f){
	if (m < 1 || n < m) return 0;
	if (f) cout << "examine " << m << " " << y << endl;
	else cout << "examine " << x << " " << m << endl;
	cin >> f; return f;
}

void GoLR(bool f,ll &L,ll &R){
	for (l=1, r=f?x:y; l<r; ){ ll m = (l+r)/2;
		if (Query(m, f)) r = m;
		else l = m+1;
	}
	L = l;

	for (l=f?x:y, r=n; l<r; ){ ll m = (l+r+1)/2;
		if (Query(m, f)) l = m;
		else r = m-1;
	}
	R = r, M = R - L + 1;

	if (M%3 == 0 && !Query(L + M/3, f) && Query(L + M/3 - 1, f)) M /= 3, R -= 2*M;
	if (M%5 == 0 && !Query(L + M/5, f) && Query(L + M/5 - 1, f)) M /= 5, R -= 4*M;

	for (; Query(L - 2*M, f); ) L -= 2*M, R -= 2*M;
}

int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

	cin >> n >> x >> y;

	GoLR(1, Lx, Rx), GoLR(0, Ly, Ry);

	// cout << Lx << " " << Ly << endl;
	cout << "solution " << Lx + (5*M - 1)/2 << " " << Ly + (5*M - 1)/2 << endl;

	return 0;
}

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