16 lines
159 B
C++
16 lines
159 B
C++
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#include<iostream>
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using namespace std;
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int main(){
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int x,a,y,b,z;
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cin >> x >> a >> y >> b;
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z = (a*x - b*y) / (a - b);
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cout << z;
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return 0;
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}
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