Please read the question very carefully, there are some fuzzy points.

1."m the number of operations performed", which metion no limitation of m.

2."The fuse will be blown if the sum of the power consumptions ci of turned on devices at some point exceeds the capacity of the fuse c. ". 

Pay attention to the word "exceeds", which means "bigger than", equation excluded.

3.if you choose online algorithm, please be noticed you have to process all operation, even if the fuse would have blown.

last, Please do not mix with max_power and blown flag.