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21 lines
442 B
21 lines
442 B
#include <bits/stdc++.h>
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using namespace std;
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bool isPrime(int n) {
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for (int i = 2; i <= n / i; i++)
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if (n % i == 0) return false;
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return true;
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}
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int n;
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int main() {
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cin >> n;
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for (int i = 4; i <= n; i += 2)
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for (int j = 2; j < i; j++)
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if (isPrime(j) && isPrime(i - j)) {
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printf("%d=%d+%d\n", i, j, i - j);
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break;
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}
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return 0;
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} |