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#1585. 【2022.9.21 NOIP 模拟赛】zzy 的金牌
https://sjzezoj.com/submission/57363
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S2OJ/1585/1585.cpp
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S2OJ/1585/1585.cpp
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#include <iostream>
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#include <algorithm>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 305;
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const int mod = 998244353;
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int n, k, a[N], f[N][N][N], g[N][N][N];
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n >> k;
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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}
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std::sort(a + 1, a + 1 + n);
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for (int i = 0; i <= k; i++) {
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g[0][0][i] = 1;
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}
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for (int i = 1; i <= n; i++) {
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for (int j = 0; j <= k; j++) {
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for (int l = 0; l <= k; l++) {
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int p = std::min(a[i] - a[i - 1] + l, k);
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if (p < 0) continue;
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if (l <= j) {
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f[i][j][l] = (f[i][j][l] + g[i - 1][j - l][p]) % mod;
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}
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g[i][j][l] = (f[i][j][l] + (l ? g[i][j][l - 1] : 0)) % mod;
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}
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}
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}
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cout << g[n][k][k] << endl;
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return 0;
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}
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