hdoj 1020 Encoding
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http://acm.hdu.edu.cn/showproblem.php?pid=1020
Encoding
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 26061 Accepted Submission(s): 11465
Problem Description
Given a string containing only 'A' - 'Z', we could encode it using the following method:
1. Each sub-string containing k same characters should be encoded to "kX" where "X" is the only character in this sub-string.
2. If the length of the sub-string is 1, '1' should be ignored.
1. Each sub-string containing k same characters should be encoded to "kX" where "X" is the only character in this sub-string.
2. If the length of the sub-string is 1, '1' should be ignored.
Input
The first line contains an integer N (1 <= N <= 100) which indicates the number of test cases. The next N lines contain N strings. Each string consists of only 'A' - 'Z' and the length is less than 10000.
Output
For each test case, output the encoded string in a line.
Sample Input
2ABCABBCCC
Sample Output
ABCA2B3C
第一次写的,理解错误,想复杂了,输入是是AABBCCAAB,输出应该是2A2B2C2AB,理解成了输出4A3B2C
#include<stdio.h>#include<string.h>int main(){ int N,n,i,j,k,b[30],c[30]; char s[200000],a[]={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'}; scanf("%d",&N); while(N--) { scanf("%s",s); n=strlen(s); memset(b,0,sizeof(b)); for(i=0,k=0;i<n;i++) { for(j=0;j<26;j++) { if(s[i]==a[j]) { b[j]+=1; break; } } c[k]=j; if(b[j]<=1) k+=1; } //printf("%d\n",k); for(i=0;i<k;i++) { if(b[c[i]]!=0) { if(b[c[i]]==1) printf("%c",a[c[i]]); else printf("%d%c",b[c[i]],a[c[i]]); } } printf("\n"); } //while(1); return 0;}
这是理解正确的代码
#include<stdio.h>#include<string.h>int main(){ int N,n,m,i,j,k; char s[20000],a[]={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'}; scanf("%d",&N); while(N--) { scanf("%s",s); n=strlen(s); for(i=0,m=0;i<n;i++) { for(j=0;j<26;j++) { if(s[i]==a[j]) m+=1; } if(s[i]!=s[i+1]&&m!=0) { if(m==1) printf("%c",s[i]); else printf("%d%c",m,s[i]); m=0; } } printf("\n"); } //while(1); return 0;}
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