25 lines
No EOL
441 B
C++
25 lines
No EOL
441 B
C++
// ac_4_14.cpp
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// Горбацевич Андрей
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#include <iostream>
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#include <cmath>
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using namespace std;
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double inline ai(int i) {
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return ((i%3 == 0)? (i / 3.) : (i / (i - 3.)));
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}
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double sai(int i) {
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double out = 0;
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for (int k = 1; k <= i; k++) {
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auto fr = ai(k);
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out += pow(fr, 2);
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}
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return out;
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}
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int main() {
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int N;
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cout << "N >>>";
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cin >> N;
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cout << "S= " << sai(N) << endl;
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} |