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3824. [Usaco2014 Dec]Guard Mark
https://hydro.ac/d/bzoj/record/6322c0dbbdf9bc31d1607432
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BZOJ/3824/3824.cpp
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BZOJ/3824/3824.cpp
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#include <iostream>
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#include <algorithm>
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#include <limits>
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#include <tuple>
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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 = 25;
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int n, h, ans = -1;
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std::tuple<int, int, int> a[N];
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bool vis[N];
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void dfs(int x) {
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if (x == n + 1) {
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int hh = 0, ss = std::numeric_limits<int>::max();
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for (int i = 1; i <= n; i++) {
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if (!vis[i]) continue;
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hh += std::get<0>(a[i]);
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int sum = 0;
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for (int j = i + 1; j <= n; j++) {
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if (!vis[j]) continue;
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sum += std::get<1>(a[j]);
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}
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ss = std::min(ss, std::get<2>(a[i]) - sum);
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}
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if (hh >= h) {
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ans = std::max(ans, ss);
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}
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return;
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}
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dfs(x + 1);
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vis[x] = true;
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dfs(x + 1);
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vis[x] = false;
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}
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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 >> h;
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for (int i = 1; i <= n; i++) {
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cin >> std::get<0>(a[i]) >> std::get<1>(a[i]) >> std::get<2>(a[i]);
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}
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std::sort(a + 1, a + 1 + n, [&](decltype(a[0]) x, decltype(a[0]) y) -> bool {
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return std::get<1>(x) + std::get<2>(x) > std::get<1>(y) + std::get<2>(y);
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});
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dfs(0);
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if (ans == -1) {
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cout << "Mark is too tall" << endl;
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} else {
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cout << ans << endl;
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}
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return 0;
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}
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