hdu5062——Beautiful Palindrome Number(模拟)
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Problem Description
A positive integer x can represent as
Input
The first line in the input file is an integer
Output
For each test case, output the number of Beautiful Palindrome Number.
Sample Input
2
1
6
Sample Output
9
258
输入只有其中情况,可以事先算出来,直接把答案存到数组里
#include <iostream>#include <cstring>#include <string>#include <vector>#include <queue>#include <cstdio>#include <set>#include <math.h>#include <algorithm>#include <queue>#include <iomanip>#define INF 0x3f3f3f3f#define MAXN 6005#define Mod 99999999using namespace std;int main(){ /*for(int n=0; n<=6; ++n) { int len=pow(10,n),ans=0; for(int i=1; i<=len; ++i) { if(i>=1&&i<=9) ans++; else if(i>=10&&i<=99) { int a=i/10,b=i%10; if(a==b) { ans++; //cout<<i<<endl; } } else if(i>=100&&i<=999) { int a=i/100,b=(i/10)%10,c=i%10; if(a<b&&a==c) { ans++; //cout<<i<<endl; } } else if(i>=1000&&i<=9999) { int k1=i/1000,k2=(i/100)%10,k3=(i/10)%10,k4=i%10; if(k1==k4&&k2==k3&&k1<k2) { ans++; //cout<<i<<endl; } } else if(i>=10000&&i<=99999) { int k1=i/10000,k2=(i/1000)%10,k3=(i/100)%10,k4=(i/10)%10,k5=i%10; if(k1==k5&&k2==k4&&k1<k2&&k2<k3) { ans++; cout<<i<<endl; } } else if(i>=100000&&i<=999999) { int k1=i/100000,k2=(i/10000)%10,k3=(i/1000)%10,k4=(i/100)%10,k5=(i/10)%10,k6=i%10; if(k1==k6&&k2==k5&&k3==k4&&k1<k2&&k3<k4&&k2<k3) { ans++; //cout<<i<<endl; } } } cout<<n<<" "<<len<<" "<<ans<<endl; } return 0;*/ int a[]={1,9,18,54,90,174,258}; int t; cin>>t; while(t--) { int n; cin>>n; cout<<a[n]<<endl; }}
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