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  • 51 Nod 1042 数位dp

    1042 数字0-9的数量

     
    给出一段区间a-b,统计这个区间内0-9出现的次数。
    比如 10-19,1出现11次(10,11,12,13,14,15,16,17,18,19,其中11包括2个1),其余数字各出现1次。
     
     

    输入

    两个数a,b(1 <= a <= b <= 10^18)

    输出

    输出共10行,分别是0-9出现的次数

    输入样例

    10 19

    输出样例

    1
    11
    1
    1
    1
    1
    1
    1
    1
    1
    #include<iostream>
    #include<cstdio>
    #include<algorithm>
    #include<cstdlib>
    #include<cstring>
    #include<string>
    #include<cmath>
    #include<map>
    #include<set>
    #include<vector>
    #include<queue>
    #include<bitset>
    #include<ctime>
    #include<time.h>
    #include<deque>
    #include<stack>
    #include<functional>
    #include<sstream>
    //#include<cctype>
    //#pragma GCC optimize(2)
    using namespace std;
    #define maxn 20005
    #define inf 0x7fffffff
    //#define INF 1e18
    #define rdint(x) scanf("%d",&x)
    #define rdllt(x) scanf("%lld",&x)
    #define rdult(x) scanf("%lu",&x)
    #define rdlf(x) scanf("%lf",&x)
    #define rdstr(x) scanf("%s",x)
    #define mclr(x,a) memset((x),a,sizeof(x))
    typedef long long  ll;
    typedef unsigned long long ull;
    typedef unsigned int U;
    #define ms(x) memset((x),0,sizeof(x))
    const long long int mod = 1e9 + 7;
    #define Mod 1000000000
    #define sq(x) (x)*(x)
    #define eps 1e-5
    typedef pair<int, int> pii;
    #define pi acos(-1.0)
    //const int N = 1005;
    #define REP(i,n) for(int i=0;i<(n);i++)
    typedef pair<int, int> pii;
    
    inline int rd() {
    	int x = 0;
    	char c = getchar();
    	bool f = false;
    	while (!isdigit(c)) {
    		if (c == '-') f = true;
    		c = getchar();
    	}
    	while (isdigit(c)) {
    		x = (x << 1) + (x << 3) + (c ^ 48);
    		c = getchar();
    	}
    	return f ? -x : x;
    }
    
    
    ll gcd(ll a, ll b) {
    	return b == 0 ? a : gcd(b, a%b);
    }
    int sqr(int x) { return x * x; }
    
    
    
    /*ll ans;
    ll exgcd(ll a, ll b, ll &x, ll &y) {
    	if (!b) {
    		x = 1; y = 0; return a;
    	}
    	ans = exgcd(b, a%b, x, y);
    	ll t = x; x = y; y = t - a / b * y;
    	return ans;
    }
    */
    
    int len;
    ll a, b;
    int num[20];
    ll dp[20][20002];
    
    ll dfs(int pos, int limit, int lead, ll sum,int dig) {
    	if (pos == 0)return sum;
    	if (!limit&&lead&&dp[pos][sum] != -1)return dp[pos][sum];
    	ll ans = 0;
    	int up = limit ? num[pos] : 9;
    	for (int i = 0; i <= up; i++) {
    		ans += dfs(pos - 1, limit && (i == up), lead || i, sum + ((i == dig)&&(lead||i)), dig);
    	}
    	if (lead && !limit)dp[pos][sum] = ans;
    	return ans;
    
    }
    
    ll sol(ll a, ll dig) {
    	mclr(dp, -1); len = 0;
    	while (a) {
    		num[++len] = a % 10; a /= 10;
    	}
    	ll ans = 0;
    	ans = dfs(len, 1, 0, 0, dig);
    	return ans;
    }
    int main()
    {
    	//	ios::sync_with_stdio(0);
    	rdllt(a); rdllt(b);
    	for (int i = 0; i <= 9; i++) {
    		printf("%lld
    ", sol(b, i) - sol(a - 1, i));
    	}
    	return 0;
    }
    
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  • 原文地址:https://www.cnblogs.com/zxyqzy/p/10448224.html
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