Hdu3555Bomb数位dp

含有49的 。。就是不要49

。。也可以直接搞

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <climits>
#include <string>
#include <iostream>
#include <map>
#include <cstdlib>
#include <list>
#include <set>
#include <queue>
#include <stack>
#include<math.h>
using namespace std;
typedef long long LL;
LL dp[100][2];
LL up[111];
LL dfs(LL now,LL pre,LL flag)
{
    if(now==1) return 1;
    if(!flag&&~dp[now][pre]) return dp[now][pre];
    LL limit=flag?up[now-1]:9,ret=0;
    for(LL i =0 ;i<=limit;i++){
        if(i==9&&pre) continue;
        ret+=dfs(now-1,i==4,flag&&(limit==i));
    }
    return flag? ret: dp[now][pre]= ret;
}
LL solve(LL x)
{
    LL len=0;
    while(x){
        up[++len]=x%10;
        x/=10;
    }
    return dfs(len+1,0,1);
}

int  main()
{
    LL n;
    LL Icase;
    memset(dp,-1,sizeof(dp));
    cin>>Icase;
    while(Icase--){
        cin>>n;
        LL t1=solve(n);
        cout<<n-t1+1<<endl;
    }
    return 0;
}

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