제출 #63326

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
63326		Bodo171	Palindrome-Free Numbers (BOI13_numbers)	C++14	1.25 / 100	4 ms	740 KiB

numbers

#include <iostream>
#include <fstream>
using namespace std;
long long cif[20];
long long dp[20][11][11][2];
int i,j,c1,c2,newc,eq,len;
long long val,a,b;
long long calc(long long x)
{
    if(x<0) return 0;
    if(x==0) return 1;
    int nr=0;
    cif[0]=10;
    while(x!=0)
        cif[++nr]=x%10,x/=10;len=nr;
    for(i=1;i<=nr/2;i++)
        swap(cif[i],cif[nr-i+1]);
    for(i=1;i<cif[1];i++)
        dp[1][10][i][0]=1;
    dp[1][10][cif[1]][1]=1;
    for(i=2;i<=len;i++)
        for(j=1;j<10;j++)
           dp[i][10][j][0]=1;
    for(i=1;i<len;i++)
        for(c1=0;c1<=10;c1++)
          for(c2=0;c2<10;c2++)
            for(eq=0;eq<=1;eq++)
    {
        val=dp[i][c1][c2][eq];
        if(val)
        {
            if(eq)
         {
            for(newc=0;newc<cif[i+1];newc++)
                if(newc!=c1&&newc!=c2)
                    dp[i+1][c2][newc][0]+=val;
            if(cif[i+1]!=c1&&cif[i+1]!=c2)
               dp[i+1][c2][cif[i+1]][1]+=val;
         }
         else
         {
            for(newc=0;newc<10;newc++)
                if(newc!=c1&&newc!=c2)
                dp[i+1][c2][newc][0]+=val;
         }
        }
    }
    long long sum=0;
    for(i=0;i<=10;i++)
       for(j=0;j<10;j++)
          sum+=dp[len][i][j][0];
    sum+=dp[len][cif[len-1]][cif[len]][1];
    for(i=1;i<=len;i++)
        for(c1=0;c1<=10;c1++)
           for(c2=0;c2<=10;c2++)
             for(eq=0;eq<2;eq++)
                dp[i][c1][c2][eq]=0;
    return sum+1;//numaram si 0
}
int main()
{
    freopen("data.in","r",stdin);
    cin>>a>>b;
    cout<<calc(b)-calc(a-1)<<'\n';
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

numbers.cpp: In function 'long long int calc(long long int)':
numbers.cpp:14:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while(x!=0)
     ^~~~~
numbers.cpp:15:30: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
         cif[++nr]=x%10,x/=10;len=nr;
                              ^~~
numbers.cpp: In function 'int main()':
numbers.cpp:62:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("data.in","r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1.25 / 25
• Subtask 2: 0 / 75