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请问这个题目hash怎么这么慢呢??????#include <iostream> using namespace std; char p[20010][30]; int nums[20010]; const int prim=100001; struct h { int key; int num; }hash[prim]; void insert(long v) { long key=v; while(key<0) key+=prim; if(key>=prim) key=key%prim; while(hash[key].num!=0) { if(hash[key].key==v){ hash[key].num++; return; } key=(key+1)%prim; } hash[key].num=1; hash[key].key=v; } int search(long v) { long key=v; while(key<0) key+=prim; if(key>=prim) key=key%prim; while(hash[key].num!=0) { if(hash[key].key==v) return hash[key].num; key=(key+1)%prim; } return 0; } int main() { int sum; int i,j; int hang,lie; while(scanf("%d%d",&hang,&lie)==2) { if(hang==0&&lie==0) { break; } for(i=0;i<prim;i++) { hash[i].num=0; } memset(nums,0,sizeof(nums)); int aim; for(i=0;i<hang;i++) { sum=0; scanf("%s",p[i]); for(j=0;j<strlen(p[i]);j++) { switch(p[i][j]) { case 'C': sum+=sum*4+1; break; case 'A': sum+=sum*4+2; break; case 'T': sum+=sum*4+3; break; case 'G': sum+=sum*4+4; break; } } insert(sum); aim=search(sum); nums[aim]++; nums[aim-1]--; } for(i=1;i<=hang;i++) { printf("%d\n",nums[i]); } } return 0; } Followed by: Post your reply here: |
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