Round Numbers POJ - 3252

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Round Numbers POJ - 3252

题意: 如果你个数的二进制中1的个数要小于等于0的个数,那么这个数就符合题意.现在要你找出来区间[li,ri]这个区间内有多少这样的数题解: 题意很明显了,是要用二进制,所以我们也把给的区间边界转化成二进制存在数组里面.然后再来枚举.要注意一点前导零可不能算在进去.比如1,它的二进制是1,那么也可以是01.001.0001等.所以前导零要排除. dp[x][y][z]表示从开始到x位,没有前导零的前提下,已经有y个0,z个1.注意要没有前导零在dfs过程中如果一个数前导零还存在情况下是不能直接…

POJ 3252 Round Numbers（组合）

题目链接:http://poj.org/problem?id=3252 题意: 一个数的二进制表示中0的个数大于等于1的个数则称作Round Numbers.求区间[L,R]内的 Round Numbers的个数. 思路: int c[N][N]; void init(){ int i,j; FOR0(i,N) { c[i][0]=c[i][i]=1; for(j=1;j<i;j++) c[i][j]=c[i-1][j-1]+c[i-1][j]; …

POJ 3252：Round Numbers

POJ 3252:Round Numbers Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 10099 Accepted: 3669 Description The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Sciss…

POJ 3252 Round Numbers

组合数学...(每做一题都是这么艰难) Round Numbers Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 7607 Accepted: 2615 Description The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, P…

[ACM] POJ 3252 Round Numbers (的范围内的二元0数大于或等于1数的数目，组合）

Round Numbers Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 8590 Accepted: 3003 Description The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors',…

poj 3252 Round Numbers(数位dp 处理前导零)

Description The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors', 'Ro, Sham, Bo', and a host of other names) in order to make arbitrary decisions such as who gets…

POJ - 3252 A - Round Numbers

The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors', 'Ro, Sham, Bo', and a host of other names) in order to make arbitrary decisions such as who gets to be milked…