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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#506028#6422. Evil CoordinateazTL 0ms3700kbC++141.9kb2024-08-05 14:47:042024-08-05 14:47:05

Judging History

你现在查看的是最新测评结果

  • [2024-08-05 14:47:05]
  • 评测
  • 测评结果:TL
  • 用时:0ms
  • 内存:3700kb
  • [2024-08-05 14:47:04]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
#define PII pair<int,int>
#define PIS pair<int,string>
#define fr(i,x,y) for(int i=x,p=y;i<=p;i++)
#define rp(i,x,y) for(int i=x,p=y;i>=p;i--)
const int N=1e6+10;
const int M=1e2+10;
int mod=998244353;
int a[N];
int f[M][M];
int xx,yy;
int n,m;
string s;
int d[4];
int dx[]={0,1,0,-1},dy[]={1,0,-1,0};
string ss="";
int fg=0;
void dfs(int x,int y,int step){
	if(step==s.size()){
		fg=1;
		cout<<ss<<endl;
		return;
	}if(fg){
		return;
	}
	fr(i,0,3){
		if(!d[i])continue;
		x+=dx[i];
		y+=dy[i];
		if(x==n&&y==m){
			continue;
		}
		d[i]--;
		if(i==1)ss+="R";
		if(i==0)ss+="U";
		if(i==3)ss+="L";
		if(i==2)ss+="D";
		dfs(x,y,step+1);
		d[i]++;
		x-=dx[i];
		y-=dy[i];
		ss.erase(ss.size()-1,1);
	}
}
void solve(){
	
	
	cin>>n>>m;
	fr(i,0,3){
		d[i]=0;
	}
	cin>>s;
	fr(i,0,s.size()-1){
		if(s[i]=='L')d[3]--;
		if(s[i]=='R')d[1]++;
		if(s[i]=='U')d[0]++;
		if(s[i]=='D')d[2]--;
	}
	
	if(n==0&&m==0){
		cout<<"Impossible"<<endl;
		return;
	}
	int cnt=0,now;
	int f[4]={0};
	fr(i,0,3){
		if(d[i]!=0&&!f[i]){
			cnt++;
			f[i]=1;
			now=i;
		}
	}
	int x=0,y=0;
	if(cnt==1){
		if(now%2){
			if(m==0&&(n>=min(0ll,d[now])&&n<=max(0ll,d[now]))){
				cout<<"Impossible"<<endl;
				return;
			}else{
				cout<<s<<endl;
				return;
			}
		}
		else{
			if(n==0&&(m>=min(0ll,d[now])&&m<=max(0ll,d[now]))){
				cout<<"Impossible"<<endl;
				return;
			}else{
				cout<<s<<endl;
				return;
			}
		}
	}
	fr(i,0,3){
		if(i%2)x+=d[i];
		else y+=d[i];
	}
	if(x==n&&y==m){
		cout<<"Impossible"<<endl;
		return;
	}
	fr(i,0,3){
		if(d[i]<0){
			d[i]=-d[i];
		}
	}
	fg=0;
	dfs(0,0,0);
	
//	cout<<ss<<endl;
	ss.clear();
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	int n=1;
	cin>>n;
	while(n--)
	solve();
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3700kb

input:

5
1 1
RURULLD
0 5
UUU
0 3
UUU
0 2
UUU
0 0
UUU

output:

UURRLLD
UUU
Impossible
Impossible
Impossible

result:

ok 5 cases

Test #2:

score: -100
Time Limit Exceeded

input:

11109
6 0
RUDUDR
2 0
URU
0 0
UDRU
0 0
R
-1 1
LDUUDDRUUL
-1 5
RRUUUDUUU
-8 4
RRDRLDR
2 0
UD
0 0
UUDD
3 -2
LDDLLLRR
3 -2
LDRURLDD
1 0
RRL
-1 0
DUDDLLRDU
-4 0
LL
-1 -1
DLRLDLUDUR
1 4
URDULUR
0 0
DDUUDUDDDD
0 2
UU
1 0
RRULD
0 -2
LDLRLLDRRL
0 1
RLRLLRLUR
-3 0
RL
0 0
D
0 0
L
0 0
DDLRRUDRUD
0 0
DULU
2 0
RR...

output:

UURRDD
UUR
Impossible
Impossible
Impossible
UUUUUURRD
RRRRDDL
UD
Impossible
RRDDLLLL
URRDDDLL
Impossible
UURDDDDLL
LL
Impossible
UUURRDL
Impossible
Impossible
Impossible
RRRDLLLLDL
Impossible
RL
Impossible
Impossible
Impossible
Impossible
Impossible
URURRRRLLL
UDLLL
Impossible
UUUDDDL
UURRDD
Impossi...

result: