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【Codefroces 490 C Hacking Cypher】+ dp

2019-11-14 09:07:14
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C. Hacking Cypher time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output

Polycarpus participates in a competition for hacking into a new secure messenger. He’s almost won.

Having carefully studied the interaction PRotocol, Polycarpus came to the conclusion that the secret key can be obtained if he properly cuts the public key of the application into two parts. The public key is a long integer which may consist of even a million digits!

Polycarpus needs to find such a way to cut the public key into two nonempty parts, that the first (left) part is divisible by a as a separate number, and the second (right) part is divisible by b as a separate number. Both parts should be positive integers that have no leading zeros. Polycarpus knows values a and b.

Help Polycarpus and find any suitable method to cut the public key. Input

The first line of the input contains the public key of the messenger — an integer without leading zeroes, its length is in range from 1 to 106 digits. The second line contains a pair of space-separated positive integers a, b (1?≤?a,?b?≤?108). Output

In the first line print “YES” (without the quotes), if the method satisfying conditions above exists. In this case, next print two lines — the left and right parts after the cut. These two parts, being concatenated, must be exactly identical to the public key. The left part must be divisible by a, and the right part must be divisible by b. The two parts must be positive integers having no leading zeros. If there are several answers, print any of them.

If there is no answer, print in a single line “NO” (without the quotes). Examples Input

116401024 97 1024

Output

YES 11640 1024

Input

284254589153928171911281811000 1009 1000

Output

YES 2842545891539 28171911281811000

Input

120 12 1

Output

NO

dp1[i] 記錄開始到 i 的 mod a 的余數,dp2[i]記錄 i 到末尾的 mod b 的余數

AC代碼:

#include<cstdio>#include<cstring>using namespace std;typedef long long LL;const int K = 1e6 + 10;char s[K];LL dp1[K],dp2[K];int main(){ LL a,b; scanf("%s %lld %lld",s + 1,&a,&b); int nl = strlen(s + 1); for(int i = 1 ; i <= nl; i++) dp1[i] = ((dp1[i - 1] * 10) % a + s[i] - '0') % a; dp2[nl] = (s[nl] - '0') % b; LL cut = 1; for(int i = nl - 1 ; i >= 1 ; i--) cut = (10 * cut) % b,dp2[i] = (dp2[i + 1] + cut * (s[i] - '0') % b) % b; int pl = 0; for(int i = 2 ; i <= nl; i++) if(s[i] != '0' && !dp1[i - 1] && !dp2[i]) pl = i; if(pl){ printf("YES/n"); for(int i = 1 ; i < pl; i++) printf("%c",s[i]);printf("/n"); for(int i = pl ; i <= nl; i++) printf("%c",s[i]);printf("/n"); } else printf("NO/n"); return 0;}
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