32 lines
588 B
C++
32 lines
588 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int n, m;
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vector<int> a;
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int sum;
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int cnt;
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void dfs(int step, int start) {
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if (step == n + 1) {
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if (sum == m) {
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for (int i = 0; i < a.size(); i++) printf("%d ", a[i]);
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printf("\n");
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cnt++;
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}
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return;
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}
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for (int i = start; i < m; i++) {
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a.push_back(i);
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sum += i;
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dfs(step + 1, i);
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sum -= i;
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a.pop_back();
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}
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}
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int main() {
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cin >> n >> m;
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dfs(1, 1);
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printf("%d", cnt);
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return 0;
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} |