In order to strengthen the defense ability, many stars in galaxy allied together and built many bidirectional tunnels to exchange messages. However, when the Galaxy War began, some tunnels were destroyed by the monsters from another dimension. Then m…
Junk-Mail Filter Time Limit: 15000/8000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 8687 Accepted Submission(s): 2753 Problem Description Recognizing junk mails is a tough task. The method used here consists of two…
X-Plosives A secret service developed a new kind ofexplosive that attain its volatile property only when a specific association ofproducts occurs. Each product is a mix of two different simple compounds, towhich we call abinding pair. If N>2, thenmix…
A secret service developed a new kind of explosive that attain its volatile property only when a specific association of products occurs. Each product is a mix of two different simple compounds, to which we call a binding pair. If N > 2, then mixing N…