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Quick Summary
Process sequential count and flip operations on a binary string.
Track global inversion state without mutating the underlying data.
Use precomputed prefix sums to answer range queries in constant time.
What This Tests
Prefix Sum arrays
State tracking and parity optimization
Efficient simulation versus naive mutation
Complexity analysis under large constraints
Common Patterns
Prefix Sum
Simulation
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Input
binaryString =
requests =
Output
Expected
