When the Integers got upset!
Monk And IQ
Samu and her Birthday Party
Maximum Spanning Tree
City and Soldiers
Codeforces Round 630 (Div. 2) E. Height All the Same
Codeforces Round 632 (Div. 2) D. Challenges in school №41
Codeforces Round 636 (Div. 3) E. Weights Distributing
Educational Codeforces Round 87 (Rated for Div. 2) E. Graph Coloring
Codeforces Round 643 (Div. 2) E. Restorer Distance