【PAT甲级】1023 Have Fun with Numbers (20 分)
题意:
输入一个不超过20位的正整数,问乘2以后是否和之前的数组排列相同(数字种类和出现的个数不变),输出Yes或No,并输出乘2后的数字。
AAAAAccepted code:
#define HAVE_STRUCT_TIMESPEC
#include<bits/stdc++.h>
using namespace std;
int vis[];
string s;
int ans[];
int main(){
cin>>s;
int len=s.size();
for(int i=len-;i>=;--i)
++vis[s[i]-''];
int cnt=;
int x=;
for(int i=len-;i>=;--i){
x=(s[i]-'')*;
if(ans[cnt+]+x%>){
ans[++cnt]+=x%-;
++ans[cnt+];
}
else{
ans[++cnt]+=x%;
if(x>)
++ans[cnt+];
}
}
for(int j=;j;--j)
if(ans[j]){
cnt=j;
break;
}
for(int i=;i<=cnt;++i)
--vis[ans[i]];
int flag=;
for(int i=;i<;++i)
if(vis[i])
flag=;
if(flag)
cout<<"No\n";
else
cout<<"Yes\n";
for(int i=cnt;i;--i)
cout<<ans[i];
return ;
}
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