Submission #596295

#	Time	Username	Problem	Language	Result	Execution time	Memory
596295		angelo_torres	Aliens (IOI07_aliens)	C++17	20 / 100	2 ms	336 KiB

aliens

#include <bits/stdc++.h>

using namespace std;


// x0 y0;
int n,xo,yo;
int xr,xl,yr,yl;

int main(){
	cin >> n >> xo >> yo;
	int l,r;
	l = xo, r = n+1;
	for(int i = 0; xo + (1<<i) <= n; ++i){
		cout << "examine " << xo + (1<<i) << " " << yo << endl;
		string ans; cin >> ans;
		if(ans == "false"){
			r = xo + (1<<i);
			break;
		}
	}
	while(r-l > 1){
		int md = (l+r)>>1;
		cout << "examine " << md << " " << yo << endl;
		string ans; cin >> ans;
		if(ans == "false")
			r = md;
		else
			l = md;
	}
	xr = l;
	l = xo, r = 0;
	for(int i = 0; xo - (1<<i) >= 1; ++i){
		cout << "examine " << xo - (1<<i) << " " << yo << endl;
		string ans; cin >> ans;
		if(ans == "false"){
			r = xo - (1<<i);
			break;
		}
	}
	while(l-r > 1){
		int md = (l+r)>>1;
		cout << "examine " << md << " " << yo << endl;
		string ans; cin >> ans;
		if(ans == "false")
			r = md;
		else
			l = md;
	}
	xl = l;
	l = yo, r = n+1;
	for(int i = 0; yo + (1<<i) <= n; ++i){
		cout << "examine " << xo << " " << yo + (1<<i) << endl;
		string ans; cin >> ans;
		if(ans == "false"){
			r = yo + (1<<i);
			break;
		}
	}
	while(r-l > 1){
		int md = (l+r)>>1;
		cout << "examine " << xo << " " << md << endl;
		string ans; cin >> ans;
		if(ans == "false") 
			r = md;
		else 
			l = md;
	}
	yr = l;
	// yr-yl = xr-xl
	yl = xl-xr+yr;
	int xc = (xl+xr)>>1, yc = (yl+yr)>>1, m = (xr-xl+1)<<1;
	bool le = 0,ri = 0;
	if(xc-m >= 1){
		cout << "examine " << xc-m << " " << yc << endl;
		string ans; cin >> ans;
		if(ans == "true")
			le = 1;
	}
	if(xc+m <= n){
		cout << "examine " << xc+m << " " << yc << endl;
		string ans; cin >> ans;
		if(ans == "true")
			ri = 1;
	}
	if(!le and ri) 
		xc += m;
	if(le and !ri)
		xc -= m;
	bool up = 0,dw = 0;
	if(yc-m >= 1){
		cout << "examine " << xc << " " << yc-m << endl;
		string ans; cin >> ans;
		if(ans == "true")
			dw = 1; 
	}
	if(yc+m <= n){
		cout << "examine " << xc << " " << yc+m << endl;
		string ans; cin >> ans;
		if(ans == "true")
			up = 1;
	}
	if(dw and !up)
		yc -= m;
	if(!dw and up)
		yc += m;
	cout << "solution " << xc << " " << yc << endl;
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 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