QOJ.ac
QOJ
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| #376785 | #4567. Admissible Map | InfinityNS | WA | 2ms | 12316kb | C++17 | 3.3kb | 2024-04-04 16:37:27 | 2024-04-04 16:37:29 |
Judging History
answer
#include<bits/stdc++.h>
#define sz(x) (int)(x).size()
#define f first
#define s second
#define pb push_back
#define ll long long
#define all(x) (x).begin(),(x).end()
using namespace std;
// 19:33
const int N=20002;
bool moze[N][N];
int visited[N];
bool inc[N];
int nxt[N];
int need[N];
bool mid[N][N],up[N][N],down[N][N];
int dfs(int tr){
if(nxt[tr]==-1){
inc[tr]=0;
visited[tr]=1;
return -1;
}
if(visited[nxt[tr]]==1){
inc[tr]=0;
visited[tr]=1;
return -1;
}
if(visited[nxt[tr]]==2){
inc[tr]=1;
visited[tr]=1;
return nxt[tr];
}
visited[tr]=2;
int r=dfs(nxt[tr]);
visited[tr]=1;
if(r==-1){
inc[tr]=0;
return -1;
}
else{
inc[tr]=1;
if(tr==r)return -1;
return r;
}
}
bool pocetak[N],kraj[N];
int nxtNo[N];
int main(){
string s;
cin >> s;
int n=sz(s);
for(int i=0;i<n;i++){
for(int j=i;j<n;j++){
mid[i][j]=s[i]!='L'&&s[j]!='R';
up[i][j]=s[j]!='U';
down[i][j]=s[j]!='D';
if(i!=j){
up[i][j]=up[i][j]&&up[i][j-1];
down[i][j]=down[i][j]&&down[i][j-1];
}
}
}
for(int len=1;len<=n;len++){
for(int i=0;i<n;i++){
inc[i]=0;
visited[i]=0;
if(s[i]=='L'){
nxt[i]=i-1;
}
if(s[i]=='R'){
nxt[i]=i==n-1?-1:i+1;
}
if(s[i]=='U'){
nxt[i]=i<len?-1:i-len;
}
if(s[i]=='D'){
nxt[i]=i>=n-len?-1:i+len;
}
need[i]=0;
}
for(int i=0;i<n;i++){
pocetak[i]=kraj[i]=0;
if(!visited[i]){
dfs(i);
}
if(nxt[i]==-1||!inc[i]){
need[i]=-1;
}
if(need[i]==-1)continue;
if(nxt[i]>i){
need[i]=max(need[i],nxt[i]);
}
else{
need[nxt[i]]=max(need[nxt[i]],i);
}
}
int no=-1;
for(int i=n-1;i>=0;i--){
if(need[i]==-1)no=i;
nxtNo[i]=no;
}
int r=0;
int lst=0;
for(int i=0;i<n;i++){
if(need[i]==-1){
lst=i+1;
r=i+1;
continue;
}
r=max(r,need[i]);
if(r==i){
pocetak[lst]=1;
kraj[r+1]=1;
lst=i+1;
r=i+1;
}
}
for(int i=0;i<=n-len;i++){
if(pocetak[i]){
int tr=i;
bool ok=up[tr][tr+len-1]&&mid[tr][tr+len-1];
tr+=len;
while(ok){
if(down[tr-len][tr-1]&&kraj[tr]){
moze[i][tr-1]=1;
}
if(tr>n-len)break;
ok=ok&&mid[tr][tr+len-1];
tr+=len;
}
}
}
}
int ans=0;
for(int i=0;i<n;i++)for(int j=i;j<n;j++)ans+=moze[i][j];
printf("%i\n",ans);
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 9896kb
input:
RDUL
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 9936kb
input:
RDRU
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 1ms
memory: 9896kb
input:
RLRLRL
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 0ms
memory: 9928kb
input:
D
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 1ms
memory: 10132kb
input:
DL
output:
0
result:
ok 1 number(s): "0"
Test #6:
score: 0
Accepted
time: 0ms
memory: 9888kb
input:
RL
output:
1
result:
ok 1 number(s): "1"
Test #7:
score: 0
Accepted
time: 0ms
memory: 9928kb
input:
DU
output:
1
result:
ok 1 number(s): "1"
Test #8:
score: 0
Accepted
time: 2ms
memory: 11948kb
input:
RDULU
output:
2
result:
ok 1 number(s): "2"
Test #9:
score: 0
Accepted
time: 0ms
memory: 11960kb
input:
RDDUULRDDD
output:
2
result:
ok 1 number(s): "2"
Test #10:
score: 0
Accepted
time: 0ms
memory: 10200kb
input:
RLRLRLRLRL
output:
15
result:
ok 1 number(s): "15"
Test #11:
score: 0
Accepted
time: 0ms
memory: 11932kb
input:
DUDUDUDUDU
output:
15
result:
ok 1 number(s): "15"
Test #12:
score: 0
Accepted
time: 2ms
memory: 9936kb
input:
RDRDULULRR
output:
3
result:
ok 1 number(s): "3"
Test #13:
score: -100
Wrong Answer
time: 0ms
memory: 12316kb
input:
UUURDRDRDLRULLRLULUDRURDRULLRU
output:
4
result:
wrong answer 1st numbers differ - expected: '2', found: '4'