Exponential time algorithms

Problems

Name Solved / Tries Average tries Average tries to solve
A Coloring Graphs 21/148 (14%) 5.48 6.24
B Wedding 2/31 (6%) 15.50 15.50
C Social Advertising 23/173 (13%) 6.92 6.78
D Tight-Fit Sudoku 7/11 (64%) 1.57 1.57