思路

www.noteanddata.com/leetcode-99… ‘贪心代码非常简洁，就是从左向右遍历， 遇到0就做flip，然后一直到数组结尾就好了！！！’

/**
 * @param {number[]} A
 * @param {number} K
 * @return {number}
 */
var minKBitFlips = function(A, K) {
    let len = A.length;
    function flip(index) {
        for(let i = 0; i < K; ++i) {
            if(index + i >= len) {
                return -1;
            }
            A[index + i] = ~~!A[index + i];
        }
        return 1;
    }
    
    let flipped = 0;
    for(let i = 0; i < len; ++i) {
        if(A[i] === 0) {
            let res = flip(i);
            if(res === -1) {
                return -1;
            }
            flipped ++;
        }
    }
    return flipped;
};