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#include <iostream> #include <vector> #include <algorithm> using namespace std; int main() { ios_base::sync_with_stdio(false); int n, x; cin >> n >> x; vector<int> niza(n); for(int i = 0; i < n; i++){ cin >> niza[i]; } int s = 0; sort(niza.begin(), niza.end()); for(int i = 0, j = n - 1; ;) { if(i > j) break; if(niza[i] + niza[j] <= x) { i++; j--; } else { j--; } s++; } cout << s << endl; return 0; }
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