| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 90192 | asifthegreat | Aliens (IOI07_aliens) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//#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(1ll,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;
}