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11 lines
208 B
C++
11 lines
208 B
C++
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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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int x, a, y, b;
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cin >> x >> a >> y >> b;
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cout << fixed << setprecision(2) << 1.00 * (b * y - a * x) / (b - a) << endl;
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return 0;
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}
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