Submission #436111

#	Time	Username	Problem	Language	Result	Execution time	Memory
436111		dutch	Aliens (IOI07_aliens)	C++17	10 / 100	5 ms	200 KiB

aliens

#include <bits/stdc++.h>
using namespace std;
#define int long long
 
int n, x, y;
 
bool q(int i, int j){
	if(min(i, j) < 1 || max(i, j) > n) return 0;
	cout << "examine " << i << ' ' << j << endl;
	string res; cin >> res;
	return res[0] == 't';
}
 
signed main(){
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> x >> y;
	int xMax = x, xMin = x, yMax = y;
 
	for(int i=1<<30, j; i/=2; ){
		j = xMax + i;
		if(q(j, y)){
			j += xMax;
			if(q(j/2, y) && (((j+3)/4)<=x || q((j+3)/4, y))) xMax += i;
		}
		j = yMax + i;
		if(q(x, j)){
			j += yMax;
			if(q(x, j/2) && (((j+3)/4)<=y || q(x, (j+3)/4))) yMax += i;
		}
		j = xMin - i;
		if(q(j, y)){
			j += xMin;
			if(q(j/2, y) && (((j+3)/4)>=x || q((j+3)/4, y))) xMin -= i;
		}
	}
 
 
	int w = 2*(xMax - xMin + 1);
	int yMin = yMax - (xMax - xMin);
	x = (xMin + xMax) / 2;
	y = (yMin + yMax) / 2;
 
	xMin = xMax = x;
	yMin = yMax = y;
 
	if(q(x-w, y)) xMin -= w;
	if(q(x-w, y)) xMin -= w;
	if(q(x+w, y)) xMax += w;
	if(q(x+w, y)) xMax += w;
 
	if(q(x, y-w)) yMin -= w;
	if(q(x, y-w)) yMin -= w;
	if(q(x, y+w)) yMax += w;
	if(q(x, y+w)) yMax += w;
 
	cout << "solution " << (xMin+xMax)/2 << ' ' << (yMin+yMax)/2 << endl;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10