ztr loves math 题目链接: http://acm.hust.edu.cn/vjudge/contest/123316#problem/A Description ztr loves research Math.One day,He thought about the "Lower Edition" of triangle equation set.Such as n = x^2 - y^2. He wanted to know that ,for a given numb…
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…
ztr loves math Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 896 Accepted Submission(s): 347 Problem Description ztr loves research Math.One day,He thought about the "Lower Edition" of…
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…
Problem Description ztr loves research Math.One day,He thought about the "Lower Edition" of triangle equation set.Such as n=x2−y2. He wanted to know that ,for a given number n,is there a positive integer solutions? Input There are T test cases.…
ztr loves substring Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 219 Accepted Submission(s): 119 Problem Description ztr love reserach substring.Today ,he has n string.Now ztr want to kon…
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 178 Accepted Submission(s): 93 Problem Description ztr love reserach substring.Today ,he has n string.Now ztr want to konw,can he take out exac…
