32 条题解
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0
- #include<bits/stdc++.h> using namespace std; const int N = 1e5 + 5; bool f(int n) { for(int i = 3 ; i * i <= n ; i += 2) { if(n % i == 0) return false; } return true; } int main() { int n; cin >> n; bool flag = true; for(int i = 3; i + 2 <= n ; i += 2) { if(f(i) && f(i + 2)) { flag = false; cout << i << " " << i + 2 << endl; } } if(flag) cout << "empty"; return 0; }
xujiayang
LV 9
@ 2026-11-1 18:06:56