摘要： Description Standard web browsers contain features to move backward and forward among the pages recently visited. One way to implement these features 阅读全文

摘要： #include <iostream>#include <cstdio>#include <cmath> int main(){ int num; while (scanf_s("%d",&num) != EOF) { int cnt = 2; long long testNum = 11; whi 阅读全文

摘要： Given any integer 0 ≤ n ≤ 10000 not divisibleby 2 or 5, some multiple of n is a number whichin decimal notation is a sequence of 1’s. Howmany digits a 阅读全文