Uva 11584 - Partitioning by Palindromes
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最少个连续回文字串
一开始朴素O(n^3)的算法果断TLE了
碎觉前想到了类似DAG的做法==
然后就AC了
#include<stdio.h>#include<string.h>#include<vector>#define INF (int)1e9std::vector<int>g[1010];char s[1010];int dp[1010];int isp[1010][1010];int is_pal(int x,int y){int &tp=isp[x][y];if(tp!=-1)return tp;if(x>=y)return tp=1;if(s[x]==s[y])return tp=is_pal(x+1,y-1);else return tp=0;}int min(int a,int b){if(a>b)return b;return a;}int dag(int x) {if(x==strlen(s))return 0;if(dp[x])return dp[x];int i;int &res=dp[x];res=INF;for(i=0;i<g[x].size();i++){res=min(res,1+dag(g[x][i]+1));}return res;}int main(){int t;scanf("%d",&t);while(t--){scanf("%s",s); int i,j,k;int len=strlen(s);for(i=0;i<len;i++)g[i].clear();for(i=0;i<len;i++)for(j=0;j<len;j++)isp[i][j]=-1;for(i=0;i<len;i++)for(j=i;j<len;j++)if(is_pal(i,j))g[i].push_back(j);for(i=0;i<len;i++)dp[i]=0;dag(0);/*for(i=0;i<len;i++){printf("g[%d]:",i);for(j=0;j<g[i].size();j++)printf("%d ",g[i][j]);printf("\n");}for(i=0;i<len-1;i++)printf("%d ",dp[i]);*/printf("%d\n",dp[0]);}return 0;}
- Uva 11584 - Partitioning by Palindromes
- UVa 11584 - Partitioning by Palindromes
- Uva-11584-Partitioning by Palindromes
- UVA 11584 - Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- UVA - 11584 Partitioning by Palindromes
- UVa:11584 Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- UVA 11584Partitioning by Palindromes
- UVA 11584 - Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- Uva 11584 Partitioning by Palindromes
- UVa 11584 Partitioning by Palindromes
- UVA - 11584 Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
- UVA 11584 Partitioning by Palindromes
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