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11 lines
227 B
C++
11 lines
227 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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double x1, y1, x2, y2;
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cin >> x1 >> y1 >> x2 >> y2;
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cout << fixed << setprecision(4) << sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2)) << endl;
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return 0;
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}
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