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12 lines
206 B
12 lines
206 B
2 years ago
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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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float z = 1.0 * (y * b - x * a) / (b - a);
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printf("%.2f",z);
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return 0;
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}
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