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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#724292 | #5312. Levenshtein Distance | houbur | WA | 1442ms | 4828kb | C++14 | 1.7kb | 2024-11-08 11:42:50 | 2024-11-08 11:42:59 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ull unsigned long long
const int N=5e4+5,bs=237;
int n,m,k;
int x,y,z,l,r,ans[N];
string s,t;
int f[35][101];
//f[i][j]表示编辑距离小于等于i,匹配上的字符串|s|-|t|=j,最大能延伸到的位置为f[i][j]
//因为j<=k,所以状态数最多只会有k^2个转移直接效仿求编辑距离的转移就好
ull hss[N],hst[N],a[N];
inline ull get_hashs(int l,int r){return hss[r]-hss[l-1]*a[r-l+1];}
inline ull get_hasht(int l,int r){return hst[r]-hst[l-1]*a[r-l+1];}
inline bool check(int x,int y,int len){return get_hashs(x,x+len-1)==get_hasht(y,y+len-1);}
inline int LCP(int x,int y){
int l=1,r=min(n-x+1,m-y+1),res=0;
while(l<=r){
int mid=(l+r)>>1;
if(check(x,y,mid))l=mid+1,res=mid;
else r=mid-1;
}return res;
}
signed main(){
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
cin>>k;
cin>>s>>t;
n=s.size();m=t.size();
s=' '+s;t=' '+t;a[0]=1;
for(int i=1;i<=max(n,m);i++)a[i]=a[i-1]*bs;
for(int i=1;i<=n;i++)hss[i]=hss[i-1]*bs+s[i];
for(int i=1;i<=m;i++)hst[i]=hst[i-1]*bs+t[i];
for(int st=1;st<=m;st++){
for(int i=0;i<=k;i++)for(int j=-i;j<=i;j++)f[i][j+k]=0;
f[0][k]=0;
for(int i=0;i<=k;i++){
for(int j=-i;j<=i;j++){
f[i][j+k]+=LCP(f[i][j+k]+1,st+f[i][j+k]+j);
if(i!=k){
f[i+1][j+k-1]=max(f[i+1][j+k-1],min(n,f[i][j+k]+1));
f[i+1][j+k]=max(f[i+1][j+k],min(f[i][j+k]+1,n));
f[i+1][j+k+1]=max(f[i+1][j+k+1],f[i][j+k]);
}
}
}
for(int j=-k;j<=k;j++){
if(j+n<=0||j+n>m-st+1)continue;
for(int i=0;i<=k;i++){
if(f[i][j+k]==n){ans[i]++;break;}
}
}
}
for(int i=0;i<=k;i++)cout<<ans[i]<<"\n";
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3552kb
input:
4 aaa aabbaab
output:
0 5 15 7 1
result:
ok 5 number(s): "0 5 15 7 1"
Test #2:
score: 0
Accepted
time: 1442ms
memory: 4828kb
input:
30 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...
output:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
result:
ok 31 numbers
Test #3:
score: -100
Wrong Answer
time: 352ms
memory: 4784kb
input:
30 BBAAABAABBBA ABBABBBBAABAAAABABBBAABAABBAABAAAAAABAABABBAAAABAAAAABABAABAABBABBAAAABBBBAABBABAAABAABAABBBBBABBABABBBBABBBBAAABBABABBBBAAABBBBAAAABABABABABABABAAABBBBBAABAABAABBAABBBAABBBBBBBABAABAABAABABAABAAABAABBBAABABBABBAAABAAAABABABBABBBAAABBBAAAABBBBABABABAABAABBBBBBBBBAABBBABABBBABAABBABBA...
output:
15 638 7828 45968 141845 255695 308984 304359 275158 237448 207961 202538 108200 104474 101488 99036 96971 95377 94094 93063 92252 91692 91234 90877 90626 90436 90302 90194 90129 90082 90037
result:
wrong answer 1st numbers differ - expected: '17', found: '15'