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QOJ

ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#95098	#5575. Knight's Tour Redux	SEM_PRESSAO_pedroteosousa^#	AC ✓	17ms	4544kb	C++14	1.4kb	2023-04-09 04:22:38	2023-04-09 04:22:39

Judging History

你现在查看的是最新测评结果

[2023-08-10 23:21:45]
System Update: QOJ starts to keep a history of the judgings of all the submissions.

[2023-04-09 04:22:39]
评测

测评结果：AC
用时：17ms
内存：4544kb

查看

[2023-04-09 04:22:38]
提交

answer

#include <bits/stdc++.h>
#define mod 998244353
#define ll long long
#define maxn 2020000
#define pii pair<int,int>
#define pb push_back
using namespace std;

int foix[maxn];
int foiy[maxn];

int n;

int mrk = 0 ;

vector<pii> ans;

void go(int x,int y){
	
		
		
		
	if(x <= 0 || x > n || y <= 0 || y > n) return;
	if(foix[x] || foiy[y]) return;
	foix[x] = foiy[y] = 1;
	mrk++;
	
	ans.pb({x,y});
	
	//printf("+ %d %d\n",x,y);
	if(mrk == n){
		//printf("ok!\n");
		for(pii e : ans)
			printf("%d %d\n",e.first,e.second);
		exit(0);
		return;
	}

	
	go(x+1,y+3);
	go(x+1,y-3);
	go(x-1,y+3);
	go(x-1,y-3);
	go(x+3,y+1);
	go(x+3,y-1);
	go(x-3,y+1);
	go(x-3,y-1);
	foix[x] = foiy[y] = 0;
	mrk--;
	
	ans.pop_back();
}

main(){

	scanf("%d",&n);
	
	if(n == 1){
		printf("POSSIBLE\n1 1\n");
		return 0;
	}
	
	if(n <= 4){
		printf("IMPOSSIBLE\n");
		return 0;
	}
	
	//go(1,3);
	
	printf("POSSIBLE\n");
	
	int cur = 0;
	
	while(cur + 18 < n){
	
		
		printf("%d %d\n",1+cur,3+cur);
		printf("%d %d\n",4+cur,2+cur);
		printf("%d %d\n",7+cur,1+cur);
		printf("%d %d\n",6+cur,4+cur);
		printf("%d %d\n",3+cur,5+cur);
		printf("%d %d\n",2+cur,8+cur);
		printf("%d %d\n",5+cur,7+cur);
		printf("%d %d\n",8+cur,6+cur);
		printf("%d %d\n",9+cur,9+cur);
		
		for(int i=1;i<=9;i++) foix[cur+i] = foiy[cur+i] = 1, mrk++;	
		cur += 9;
	}
	
	go(cur+1,cur+3);
	
	

}

Source code, Language: C++14

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 0ms

memory: 3532kb

input:

output:

POSSIBLE
1 1

result:

ok answer = 1

Test #2:

score: 0

Accepted

time: 0ms

memory: 3688kb

input:

output:

IMPOSSIBLE

result:

ok answer = 0

Test #3:

score: 0

Accepted

time: 2ms

memory: 3692kb

input:

output:

IMPOSSIBLE

result:

ok answer = 0

Test #4:

score: 0

Accepted

time: 1ms

memory: 3492kb

input:

output:

IMPOSSIBLE

result:

ok answer = 0

Test #5:

score: 0

Accepted

time: 1ms

memory: 3536kb

input:

output:

POSSIBLE
1 3
4 4
5 1
2 2
3 5

result:

ok answer = 1

Test #6:

score: 0

Accepted

time: 2ms

memory: 3520kb

input:

output:

POSSIBLE
1 3
2 6
5 5
6 2
3 1
4 4

result:

ok answer = 1

Test #7:

score: 0

Accepted

time: 0ms

memory: 3520kb

input:

output:

POSSIBLE
1 3
2 6
5 7
6 4
7 1
4 2
3 5

result:

ok answer = 1

Test #8:

score: 0

Accepted

time: 2ms

memory: 3512kb

input:

output:

result:

ok answer = 1

Test #9:

score: 0

Accepted

time: 1ms

memory: 3580kb

input:

output:

result:

ok answer = 1

Test #10:

score: 0

Accepted

time: 2ms

memory: 3588kb

input:

output:

result:

ok answer = 1

Test #11:

score: 0

Accepted

time: 1ms

memory: 3764kb

input:

output:

result:

ok answer = 1

Test #12:

score: 0

Accepted

time: 2ms

memory: 3764kb

input:

output:

result:

ok answer = 1

Test #13:

score: 0

Accepted

time: 2ms

memory: 3524kb

input:

output:

result:

ok answer = 1

Test #14:

score: 0

Accepted

time: 2ms

memory: 3768kb

input:

output:

result:

ok answer = 1

Test #15:

score: 0

Accepted

time: 1ms

memory: 3588kb

input:

output:

result:

ok answer = 1

Test #16:

score: 0

Accepted

time: 0ms

memory: 3588kb

input:

output:

result:

ok answer = 1

Test #17:

score: 0

Accepted

time: 2ms

memory: 3708kb

input:

output:

result:

ok answer = 1

Test #18:

score: 0

Accepted

time: 1ms

memory: 3572kb

input:

output:

result:

ok answer = 1

Test #19:

score: 0

Accepted

time: 0ms

memory: 3592kb

input:

output:

result:

ok answer = 1

Test #20:

score: 0

Accepted

time: 2ms

memory: 3520kb

input:

output:

result:

ok answer = 1

Test #21:

score: 0

Accepted

time: 16ms

memory: 4364kb

input:

output:

result:

ok answer = 1

Test #22:

score: 0

Accepted

time: 8ms

memory: 4376kb

input:

output:

result:

ok answer = 1

Test #23:

score: 0

Accepted

time: 11ms

memory: 4380kb

input:

output:

result:

ok answer = 1

Test #24:

score: 0

Accepted

time: 9ms

memory: 4360kb

input:

output:

result:

ok answer = 1

Test #25:

score: 0

Accepted

time: 17ms

memory: 4316kb

input:

output:

result:

ok answer = 1

Test #26:

score: 0

Accepted

time: 14ms

memory: 4296kb

input:

output:

result:

ok answer = 1

Test #27:

score: 0

Accepted

time: 8ms

memory: 4376kb

input:

output:

result:

ok answer = 1

Test #28:

score: 0

Accepted

time: 9ms

memory: 4364kb

input:

output:

result:

ok answer = 1

Test #29:

score: 0

Accepted

time: 10ms

memory: 4380kb

input:

output:

result:

ok answer = 1

Test #30:

score: 0

Accepted

time: 8ms

memory: 4544kb

input:

output:

result:

ok answer = 1

Test #31:

score: 0

Accepted

time: 7ms

memory: 4296kb

input:

output:

result:

ok answer = 1

Test #32:

score: 0

Accepted

time: 6ms

memory: 4160kb

input:

output:

result:

ok answer = 1

Test #33:

score: 0

Accepted

time: 4ms

memory: 3788kb

input:

output:

result:

ok answer = 1

Test #34:

score: 0

Accepted

time: 5ms

memory: 3912kb

input:

output:

result:

ok answer = 1

Test #35:

score: 0

Accepted

time: 2ms

memory: 3824kb

input:

output:

result:

ok answer = 1

Test #36:

score: 0

Accepted

time: 4ms

memory: 3820kb

input:

output:

result:

ok answer = 1

Test #37:

score: 0

Accepted

time: 7ms

memory: 4156kb

input:

output:

result:

ok answer = 1

Test #38:

score: 0

Accepted

time: 10ms

memory: 4464kb

input:

output:

result:

ok answer = 1

Test #39:

score: 0

Accepted

time: 2ms

memory: 3528kb

input:

output:

result:

ok answer = 1

Test #40:

score: 0

Accepted

time: 6ms

memory: 4188kb

input:

output:

result:

ok answer = 1

Test #41:

score: 0

Accepted

time: 17ms

memory: 4520kb

input:

output:

result:

ok answer = 1

Test #42:

score: 0

Accepted

time: 10ms

memory: 4204kb

input:

output:

result:

ok answer = 1

Test #43:

score: 0

Accepted

time: 11ms

memory: 4248kb

input:

output:

result:

ok answer = 1

Test #44:

score: 0

Accepted

time: 11ms

memory: 4020kb

input:

output:

result:

ok answer = 1

Test #45:

score: 0

Accepted

time: 7ms

memory: 3960kb

input:

output:

result:

ok answer = 1

Test #46:

score: 0

Accepted

time: 7ms

memory: 4180kb

input:

output:

result:

ok answer = 1

Test #47:

score: 0

Accepted

time: 0ms

memory: 3664kb

input:

output:

result:

ok answer = 1

Test #48:

score: 0

Accepted

time: 14ms

memory: 4200kb

input:

output:

result:

ok answer = 1

Test #49:

score: 0

Accepted

time: 0ms

memory: 3636kb

input:

output:

result:

ok answer = 1

Test #50:

score: 0

Accepted

time: 13ms

memory: 4096kb

input:

output:

result:

ok answer = 1

Test #51:

score: 0

Accepted

time: 11ms

memory: 4232kb

input:

output:

result:

ok answer = 1

Test #52:

score: 0

Accepted

time: 14ms

memory: 4144kb

input:

output:

result:

ok answer = 1

Test #53:

score: 0

Accepted

time: 11ms

memory: 4488kb

input:

output:

result:

ok answer = 1

Test #54:

score: 0

Accepted

time: 12ms

memory: 4148kb

input:

output:

result:

ok answer = 1

Test #55:

score: 0

Accepted

time: 3ms

memory: 3832kb

input:

output:

result:

ok answer = 1

Test #56:

score: 0

Accepted

time: 10ms

memory: 3968kb

input:

output:

result:

ok answer = 1

Test #57:

score: 0

Accepted

time: 5ms

memory: 4060kb

input:

output:

result:

ok answer = 1

Test #58:

score: 0

Accepted

time: 8ms

memory: 4132kb

input:

output:

result:

ok answer = 1

Test #59:

score: 0

Accepted

time: 0ms

memory: 3952kb

input:

output:

result:

ok answer = 1

Test #60:

score: 0

Accepted

time: 4ms

memory: 3692kb

input:

output:

result:

ok answer = 1

Test #61:

score: 0

Accepted

time: 7ms

memory: 3940kb

input:

output:

result:

ok answer = 1

Test #62:

score: 0

Accepted

time: 7ms

memory: 3844kb

input:

output:

result:

ok answer = 1

Test #63:

score: 0

Accepted

time: 9ms

memory: 3984kb

input:

output:

result:

ok answer = 1

Test #64:

score: 0

Accepted

time: 3ms

memory: 3736kb

input:

output:

result:

ok answer = 1

Test #65:

score: 0

Accepted

time: 3ms

memory: 4152kb

input:

output:

result:

ok answer = 1

Test #66:

score: 0

Accepted

time: 9ms

memory: 4020kb

input:

output:

result:

ok answer = 1

Test #67:

score: 0

Accepted

time: 5ms

memory: 3780kb

input:

output:

result:

ok answer = 1

Test #68:

score: 0

Accepted

time: 7ms

memory: 3804kb

input:

output:

result:

ok answer = 1

Test #69:

score: 0

Accepted

time: 15ms

memory: 4288kb

input:

output:

result:

ok answer = 1

Test #70:

score: 0

Accepted

time: 15ms

memory: 4384kb

input:

output:

result:

ok answer = 1

Test #71:

score: 0

Accepted

time: 3ms

memory: 3612kb

input:

output:

result:

ok answer = 1