18 lines
355 B
C++
18 lines
355 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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const int N=30010;
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int n,m;
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int w[N];
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int main() {
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cin>>m>>n;
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for (int i = 0; i < n; i++) cin >> w[i];
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sort(w, w + n);
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int res = 0;
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for (int i = 0, j = n - 1; i <= j; j--) {
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if (w[i] + w[j] <= m) i++;
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res++;
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}
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cout << res << endl;
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return 0;
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}
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