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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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ios::sync_with_stdio(false); //读入输出优化的强迫症
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int a, b, c;
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cin >> a >> b >> c;
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int d = a + b + c;
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float e = d * 1.0 / 3;
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//设置输出为小数点后3位
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cout << fixed << setprecision(3);
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cout << e << endl;
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return 0;
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} |
