摘要：1336 - Sigma Function Sigma function is an interesting function in Number Theory. It is denoted by the Greek letter Sigma (σ). This function actually 阅读全文

摘要：1282 - Leading and Trailing You are given two integers: n and k, your task is to find the most significant three digits, and least significant three d 阅读全文

摘要：1236 - Pairs Forming LCM Find the result of the following code: long long pairsFormLCM( int n ) { long long res = 0; for( int i = 1; i <= n; i++ ) for 阅读全文

摘要：1215 - Finding LCM LCM is an abbreviation used for Least Common Multiple in Mathematics. We say LCM (a, b, c) = L if and only if L is the least intege 阅读全文

摘要：1213 - Fantasy of a Summation If you think codes, eat codes then sometimes you may get stressed. In your dreams you may see huge codes, as I have seen 阅读全文

摘要：1163 - Bank Robbery In one very cold morning, Mark decides to rob a bank. But while trying hacking into the security system, he found that it is locke 阅读全文

摘要：1138 - Trailing Zeroes (III) You task is to find minimal natural number N, so that N! contains exactly Q zeroes on the trail in decimal notation. As y 阅读全文