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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
39 lines
1009 B
C++
39 lines
1009 B
C++
# include <iostream>
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# include <cstdio>
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# include <cstring>
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using namespace std;
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int p[1002][26],pre[1002],n,m;
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char a[10002],b[1002];
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int f[10002][1002];
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void relax(int &i,const int&j){if(i>j) i=j;}
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int main()
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{
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int Case; scanf("%d",&Case);
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while(Case--){
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scanf("%s",a+1); scanf("%s",b+1);
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n = strlen(a+1); m = strlen(b+1);
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for(int i=1; i<=n; i++)a[i]-='a',b[i]-='a';
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int k = 0; pre[1] = 0;
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for(int i=2; i<=m; i++) {
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while(k && b[k+1]!=b[i]) k = pre[k];
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if(b[k+1] == b[i]) k++; pre[i]=k;
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}
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memset(p,0,sizeof(p));
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for(int i=1; i<=m; i++) p[i-1][b[i]]=i;
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for(int i=1; i<=m; i++)
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for(int j=0; j<26; j++)
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if(!p[i][j]) p[i][j] = p[pre[i]][j];
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for(int j=0; j<26; j++) p[m][j] = m;
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memset(f,0x7f,sizeof(f)); f[0][0]=0;
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for(int i=0; i<n; i++)
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for(int j=0; j<m; j++)
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if( f[i][j]<0x7f7f7f7f )
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relax(f[i+1][j], f[i][j]+1),
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relax(f[i+1][p[j][a[i+1]]], f[i][j]);
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int ans = n+1;
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for(int i=0; i<m; i++) relax(ans, f[n][i]);
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printf("%d\n",ans);
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}
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return 0;
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}
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