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#include <bits/stdc++.h>
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using namespace std;
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// double<6C><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD>==<3D>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD>Ϊʲô<CAB2><C3B4><EFBFBD><EFBFBD>
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// https://blog.csdn.net/m0_38125278/article/details/89026537
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//Epslion<6F><6E>ϣ<EFBFBD><CFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˼<EFBFBD><CBBC><EFBFBD><EFBFBD>ȡ1*10<31><30>-8<><38><EFBFBD><EFBFBD>
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#define Epslion 1e-8
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int main() {
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double n;
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cin >> n;
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//<2F><><EFBFBD><EFBFBD>
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int count = 0;
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//<2F>ݴ<EFBFBD><DDB4><EFBFBD><EFBFBD><EFBFBD>
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int a[10] = {0};
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while (true) {
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n *= 2;
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int jiInt = (int) n;
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a[count++] = jiInt;
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n -= jiInt;
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//С<><D0A1>һ<EFBFBD><D2BB><EFBFBD>ľ<EFBFBD><C4BE><EFBFBD>
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if (n < Epslion) break;
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}
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cout << "0.";
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for (int i = 0; i < count; i++) {
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cout << a[i];
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}
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return 0;
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}
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