const realIdx = i % len; // 取模映射到真实数组索引，模拟循环
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Nasa said he had "turned a potential tragedy into a success" after an attempt to land on the Moon was aborted because of an explosion onboard the spacecraft while it was hundreds of thousands of miles from Earth.
for (int32_t i = 0; i < data.length; i++) {
k--; // 剩余删除名额减1（关键：控制删除位数，保证保留足够长度）