平均数1
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#include <iostream>
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using namespace std;
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int main()
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{
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float a, b, w = 3.5 + 7.5;
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scanf("%f%f", &a, &b);
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printf("MEDIA = %.5f", a * 3.5 / w + b * 7.5 / w);
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return 0;
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}
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