Given an infinite sorted binary array (containing only 0s and 1s), find the index of the first occurrence of 1.
{
"arr": [
0,
0,
0,
0,
0,
1,
1,
1,
1
]
}5{
"arr": [
1,
1,
1,
1,
1,
1
]
}0{
"arr": [
0,
0,
0,
0,
0,
0
]
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