codeforces_612A. The Text Splitting
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You are given the string s of length n and the numbers p, q. Split the string s to pieces of length p and q.
For example, the string "Hello" for p = 2, q = 3 can be split to the two strings "Hel" and "lo" or to the two strings "He" and "llo".
Note it is allowed to split the string s to the strings only of length p or to the strings only of length q (see the second sample test).
The first line contains three positive integers n, p, q (1 ≤ p, q ≤ n ≤ 100).
The second line contains the string s consists of lowercase and uppercase latin letters and digits.
If it's impossible to split the string s to the strings of length p and q print the only number "-1".
Otherwise in the first line print integer k — the number of strings in partition of s.
Each of the next k lines should contain the strings in partition. Each string should be of the length p or q. The string should be in order of their appearing in string s — from left to right.
If there are several solutions print any of them.
5 2 3Hello
2Hello
10 9 5Codeforces
2Codeforces
6 4 5Privet
-1
8 1 1abacabac
8abacabac
一道水题wa了两次,因为没有考虑到p和q成不同倍数与n相等的情况。。好吧状态很差代码很丑。
#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>#include <cmath>using namespace std;char aa[110];int a,b;int solve(int p,int q,int x){ int flag=0; int qq=q,pp=p; for(a=0;p+q<=100;a++) { p=pp; p*=a; for(b=0;p+q<=100;b++) { q=qq; q*=b; if(p+q==x) { flag=1;break; } } if(flag)break; q=0; } return flag;}int main(){ int n,p,q,i,j; scanf("%d%d%d",&n,&p,&q); scanf("%s",&aa); int len=strlen(aa); if(p+q==len) { printf("%d\n",2); for(i=0;i<p;i++) printf("%c",aa[i]); printf("\n"); for(;i<len;i++) printf("%c",aa[i]); printf("\n"); } else if(solve(p,q,n)) { int l=0; printf("%d\n",a+b); for(i=0;i<a;i++) { for(j=0;j<p;j++) { printf("%c",aa[l]); l++; } printf("\n"); } for(i=0;i<b;i++) { for(j=0;j<q;j++) { printf("%c",aa[l]); l++; } printf("\n"); } } else { printf("-1\n"); } return 0;}
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