题目链接:http://codeforces.com/contest/498/problem/A

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=11352&rd=14431

題目鏈接:http://codeforces.com/contest/497/problem/C

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13523&rd=16085

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13555&rd=16085

題目鏈接:http://codeforces.com/contest/497/problem/B

題目鏈接:http://codeforces.com/contest/496/problem/C

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=11340&rd=14430

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=11343&rd=14429

題目鏈接:http://arc031.contest.atcoder.jp/tasks/arc031_3

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13552&rd=16083

題目鏈接:http://codeforces.com/contest/495/problem/C

題目鏈接:http://www.lydsy.com/JudgeOnline/problem.php?id=1007

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=11342&rd=14429

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13549&rd=16084

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13547&rd=16084

題目鏈接:http://www.lydsy.com/JudgeOnline/problem.php?id=1003

題目鏈接:http://www.lydsy.com/JudgeOnline/problem.php?id=1008

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13551&rd=16083

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=13557&rd=16083

題目鏈接:http://www.lydsy.com/JudgeOnline/problem.php?id=1010

題目鏈接:http://www.lydsy.com/JudgeOnline/problem.php?id=1036

题目链接:http://www.lydsy.com/JudgeOnline/problem.php?id=1001

題目鏈接:http://www.codechef.com/DEC14/problems/XORSUB

題目連接:http://codeforces.com/contest/493/problem/D

題目鏈接:http://community.topcoder.com/stat?c=problem_statement&pm=11328&rd=14428

題目鏈接:http://codeforces.com/contest/493/problem/C

題目鏈接: http://codeforces.com/contest/493/problem/A http://codeforces.com/contest/493/problem/B

題目鏈接:http://arc001.contest.atcoder.jp/tasks/arc001_4

題目鏈接:http://codeforces.com/contest/492/problem/D