Problems
Topics
Graph of operations#1934
Very easy · 2-SAT
Idol#4030
Very easy · 2-SAT
Contest!#4803
Very easy · 2-SAT
Seven Kingdoms#6397
Very hard · 2-SAT · Graphs · Constructive Algorithms
Magic Graphs#6580
Very hard · 2-SAT · Depth-first Search · Graphs
Excursion#8710
Easy · 2-SAT
Sprague-Grundy numbers#11794
Very hard · 2-SAT · Binary Search · Segment Tree · Data Structures · Prefix Sums · Graphs
Boys and Girls#11810
Very easy · 2-SAT