1023. Have Fun with Numbers (20)

题目：https://www.patest.cn/contests/pat-a-practise/1023

#include<cstring>#include<cstdio>using namespace std;int a[10]={0};char str1[25],str2[25];void mulit2(){int len=0,carry=0,temp=0;int len1=strlen(str1);for(int i=len1-1; i>=0; i--){temp = (str1[i] - '0')*2 + carry;carry = temp/10;temp = temp%10;str2[len++] = temp+'0';}if(carry != 0)str2[len++] = carry + '0';str2[len] = '\0';}int main(){int flag = 0;scanf("%s",str1);int len = strlen(str1);for(int i=0; i<len; i++)a[str1[i]-'0']++;mulit2();if(strlen(str1) != strlen(str2)){printf("No\n");}else {len  = strlen(str2);for(int i=0; i<len; i++)a[str2[i]-'0']--;for(int i=0; i<10; i++){if(a[i] != 0)flag = 1;}if(flag == 1)printf("No\n");elseprintf("Yes\n");}len = strlen(str2);for(int i=len-1; i>=0; i--)printf("%c",str2[i]);return 0;}