Submission #90193

#	Time	Username	Problem	Language	Result	Execution time	Memory
90193		asifthegreat	Aliens (IOI07_aliens)	C++14	0 / 100	2 ms	536 KiB

aliens

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

#define debug(a) cout << #a << " = " << a << endl;
//#define int long long 

//const int N = 1000;

//bool mat[N][N];

//int NUMBER_OF_CHECKING = 0;

//void initialize(int n,int m);
bool check(int x,int y);

/*void initialize(int m)
{
	memset(mat,false,sizeof mat);
	for(int i = 5; i <= 5+m-1;i++){
		//int i = 5;
		for(int j = 5; j <= 5+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 15; j <= 15+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 25; j <= 25+m-1;j++){
			mat[i][j] = true;
		}

	}
	for(int i = 15; i <= 15+m-1;i++){
		//int i = 5;
		for(int j = 5; j <= 5+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 15; j <= 15+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 25; j <= 25+m-1;j++){
			mat[i][j] = true;
		}

	}
	for(int i = 25; i <= 25+m-1;i++){
		//int i = 5;
		for(int j = 5; j <= 5+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 15; j <= 15+m-1;j++){
			mat[i][j] = true;
		}
		for(int j = 25; j <= 25+m-1;j++){
			mat[i][j] = true;
		}
	}
	for(int i = 1; i <= 50;i++){
		for(int j = 1; j <= 50;j++){
			cout << mat[i][j] << " ";
		}cout << endl;
	}
}*/


bool check(int x,int y)
{
	string s;
	printf("examine %d %d\n",x,y);
	fflush(stdout);
	cin >> s;
	return s == "true";
	/*NUMBER_OF_CHECKING++;
	if(NUMBER_OF_CHECKING > 300){
		printf("Too many queries.. aborting\n");
		exit(-1);
	}
	if(x < 1 or y < 1 or x > 10000 or y > 10000){
		printf("cartesian point out of range\n mission aborting....\n");
		printf("[%d %d]\n",x,y);
		exit(-1);
	}
	if(mat[x][y])return true;
	return false;*/
}


int32_t main()
{
	int n,m;
	scanf("%d %d ",&n,&m);
	//cin >> n >> m;
	//initialize(m);
	//cout << check(17,17) << endl;
	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 > 2){
		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);
		}
	}
	//debug(dan);
	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;

	// dan clear hoyei gelo :-D 
	lo = max(1,y-m);
	hi = y;
	bam = y;
	while(hi-lo > 2){
		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);
		}
	}
	//printf("dan = %lld\nbam = %lld\n",dan,bam);
	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;
	}
	//printf("dan = %lld bam = %lld\n",dan,bam);
	// bam to hoyei gelo :-D 
	hi = x;
	lo = max(1,x-m);
	upore = x;
	while(hi-lo > 2){
		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 > 2){
		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);
		}
	}
	//debug(dan);
	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;
	//printf("dan = %lld bam = %lld upore = %lld niche = %lld\n",dan,bam,upore,niche);
	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:91:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d ",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~~
aliens.cpp:96:7: 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
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• Subtask 10: 0 / 10