Submission #90194

#	Time	Username	Problem	Language	Result	Execution time	Memory
90194		asifthegreat	Aliens (IOI07_aliens)	C++14	0 / 100	2 ms	484 KiB

aliens

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


bool check(int x,int y)
{
	string s;
	printf("examine %d %d\n",x,y);
	fflush(stdout);
	cin >> s;
	return s == "true";
}

int32_t main()
{
	int n,m;
	scanf("%d %d ",&n,&m);
	int x,y;
	scanf("%d %d",&x,&y);
	int lo = y,hi = y+m;
	int dan = -1,bam=-1,upore=-1,niche=-1;
	while(hi > lo){
		int mid=(lo+hi)/2;
		if(check(x,mid)){
			dan = max(dan,mid);
			lo = mid+1;
		}
		else hi = mid-1;
	}
	/*for(int mid = lo;mid <= hi;mid++){
		if(check(x,mid)){
			dan = max(dan,mid);
		}
	}*/
	if(dan+m*4 <= n and check(x,dan+m*4)){
		dan = dan+m*4;
	}
	else if(dan + m* 2 <= n and check(x,dan+m*2))dan = dan+m*2;
	lo = max(1,y-m);
	hi = y;
	bam = y;
	while(hi>lo){
		int mid=(lo+hi)/2;
		if(check(x,mid)){
			bam = min(bam,mid);
			hi = mid-1;
		}
		else lo = mid+1;
	}
	/*for(int mid = lo;mid <= hi;mid++){
		if(check(x,mid)){
			bam = min(bam,mid);
		}
	}*/
	if(bam-m*4 > 0 and check(x,bam-m*4)){
		bam -= m*4;
	}
	else if(bam-m*2 > 0 and check(x,bam-m*2)){
		bam -= m*2;
	}
	hi = x;
	lo = max(1,x-m);
	upore = x;
	while(hi>lo){
		int mid=(lo+hi)/2;
		if(check(mid,y)){
			upore = min(upore,mid);
			hi = mid-1;
		}
		else lo = mid+1;
	}
	/*for(int mid = lo;mid <= hi;mid++){
		if(check(mid,y)){
			upore = min(upore,mid);
		}
	}*/
	if(upore-m*4 > 0 and check(upore-m*4,y)){
		upore -= m*4;
	}
	else if(upore-m*2 > 0 and check(upore-m*2,y)){
		upore -= m*2;
	}
	niche = x;
	lo = x;
	hi = x+m;
	while(hi>lo){
		int mid=(lo+hi)/2;
		if(check(mid,y)){
			niche = max(niche,mid);
			lo = mid+1;
		}
		else hi = mid-1;
	}
	/*for(int mid = lo;mid <= hi;mid++){
		if(check(mid,y)){
			niche = max(niche,mid);
		}
	}*/
	if(niche+m*4 <= n and check(niche+m*4,y)){
		niche = niche+m*4;
	}
	else if(niche + m* 2 <= n and check(niche+m*2,y))niche = niche+m*2;
	x = (niche-upore)/2 + m;
	y = (dan-bam)/2 + m;
	printf("solution %d %d\n",x,y);
	fflush(stdout);
	return 0;
}

Compilation message (stderr)

aliens.cpp: In function 'int32_t main()':
aliens.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d ",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~~
aliens.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&x,&y);
  ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 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