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1276 - Very Lucky Numbers    PDF (English) Statistics Forum Time Limit: 3 second(s) Memory Limit: 32 MB According to some theory 4 and 7 are lucky digits, and all the other digits are not lucky. A lucky number is a number that contains only lucky dig…
ztr loves lucky numbers 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/I Description ztr loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For…
C. Lucky Numbers time limit per test 0.5 seconds memory limit per test 64 megabytes input standard input output standard output The numbers of all offices in the new building of the Tax Office of IT City will have lucky numbers. Lucky number is a num…
Problem Description ztr loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Lucky number is…
630C - Lucky Numbers 题目大意: 给定数字位数,且这个数字只能由7和8组成,问有多少种组合的可能性 思路: 假设为1位,只有7和8:两位的时候,除了77,78,87,88之外还哇哦加上前面只有7和8的情况,一共是6位.所以递推式不难写出dp[i]=pow(2,i)+dp[i-1]; 代码: #include <bits/stdc++.h> using namespace std; typedef long long ll; ll ans[56]; void init ()…
ztr loves lucky numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1834    Accepted Submission(s): 707 Problem Description ztr loves lucky numbers. Everybody knows that positive integers ar…
传送门: http://acm.zcmu.edu.cn/JudgeOnline/problem.php?id=2177 2177: Lucky Numbers (easy) 时间限制: 2 Sec  内存限制: 256 MB提交: 42  解决: 21[提交][状态][讨论版] 题目描述 time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard ou…
题目链接: ztr loves lucky numbers  Time Limit: 2000/1000 MS (Java/Others)  Memory Limit: 65536/65536 K (Java/Others) 问题描述 ztr喜欢幸运数字,他对于幸运数字有两个要求 1:十进制表示法下只包含4.7 2:十进制表示法下4和7的数量相等 比如47,474477就是 而4,744,467则不是 现在ztr想知道最小的但不小于n的幸运数字是多少 输入描述 有TT(1≤T≤10​5​​)组数…
Problem description Petya loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Lucky number…
Roma and Lucky Numbers time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Roma (a popular Russian name that means 'Roman') loves the Little Lvov Elephant's lucky numbers. Let us remind you tha…