QOJ: The 3rd Universal Cup. Stage 14: Harbin

QOJ/9519.cpp

@@ -0,0 +1,59 @@
+/**
+ * @file 9519.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2024-10-26
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+#define endl '\n'
+
+#define maxn 105
+
+typedef pair<int, int> pii;
+typedef tuple<int, int, int> tiii;
+
+vector<pii> graph[maxn];
+vector<tiii> links;
+int cnt = 0;
+
+void solve(int dep, int l, int r, int ql, int qr, int fa, bool pre, bool lst) {
+    if (ql <= l && r <= qr) return links.emplace_back(fa, dep, lst), void();
+    int mid = (l + r) >> 1;
+    if (!pre) graph[fa].emplace_back(++cnt, lst), fa = cnt;
+    if (ql <= mid) solve(dep - 1, l, mid, ql, qr, fa, pre, 0);
+    if (qr > mid) solve(dep - 1, mid + 1, r, ql, qr, fa, false, 1);
+    return;
+}
+
+void solve(void) {
+    int L, R;
+    cin >> L >> R;
+    solve(20, 0, (1 << 20) - 1, L, R, ++cnt, true, 0);
+    cnt++;
+    int maxv = 0;
+    for (auto i : links) maxv = max(maxv, get<1>(i));
+    for (int i = 1; i <= maxv; i++) graph[cnt + i].emplace_back(cnt + i - 1, 0), graph[cnt + i].emplace_back(cnt + i - 1, 1);
+    for (auto [x, d, w] : links) graph[x].emplace_back(cnt + d, w);
+    cnt += maxv;
+    cout << cnt << endl;
+    for (int i = 1; i <= cnt; i++) {
+        cout << graph[i].size();
+        for (auto [x, d] : graph[i]) cout << ' ' << x << ' ' << d;
+        cout << endl;
+    }
+    return;
+}
+
+int main() {
+    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    int _ = 1;
+    while (_--) solve();
+
+    return 0;
+}

QOJ/9521.cpp

@@ -0,0 +1,49 @@
+/**
+ * @file 9521.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2024-10-26
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+#define endl '\n'
+
+char c[15];
+int w[15], d[15];
+
+void solve(void) {
+    int n;
+    cin >> n;
+    for (int i = 1; i <= n; i++) {
+        cin >> c[i] >> d[i];
+        if (c[i] == 'N')
+            w[i] = 0;
+        else if (c[i] == 'E')
+            w[i] = 1;
+        else if (c[i] == 'S')
+            w[i] = 2;
+        else
+            w[i] = 3;
+    }
+    cout << 2 * n - 1 << ' ' << c[1] << endl;
+    cout << "Z " << d[1] << endl;
+    for (int i = 2; i <= n; i++) {
+        cout << "LR"[w[i] == (w[i - 1] + 1) % 4] << endl;
+        cout << "Z " << d[i] << endl;
+    }
+    return;
+}
+
+int main() {
+    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    int _ = 1;
+    cin >> _;
+    while (_--) solve();
+
+    return 0;
+}

QOJ/9523.cpp

@@ -0,0 +1,74 @@
+/**
+ * @file 9523.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2024-10-26
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+#define endl '\n'
+
+#define maxn 505
+#define mod 1000000007
+
+typedef tuple<int, int, int> tiii;
+
+int64_t qpow(int64_t a, int64_t x) {
+    int64_t ans = 1;
+    while (x) {
+        if (x & 1) ans = ans * a % mod;
+        a = a * a % mod, x >>= 1;
+    }
+    return ans;
+}
+int64_t inv(int64_t a) { return qpow(a, mod - 2); }
+
+int x[maxn], v[maxn], coef[maxn];
+int64_t f[maxn];
+vector<tiii> a;
+
+void insert(int64_t a, int64_t b) {
+    for (int i = maxn - 2; ~i; i--) f[i + 1] = (f[i + 1] + f[i] * a) % mod, f[i] = f[i] * b % mod;
+    return;
+}
+void erase(int64_t a, int64_t b) {
+    int64_t invb = inv(b);
+    for (int i = 0; i < maxn - 1; i++) f[i] = f[i] * invb % mod, f[i + 1] = (f[i + 1] + mod - f[i] * a % mod) % mod;
+    return;
+}
+
+void solve(void) {
+    int n, m;
+    cin >> n >> m;
+    for (int i = 1; i <= n; i++) cin >> x[i], x[i] = -x[i];
+    for (int i = 1; i <= m; i++) cin >> v[i];
+
+    for (int i = 1; i <= n; i++)
+        for (int j = 1; j <= m; j++) a.emplace_back(x[i], v[j], j);
+    sort(a.begin(), a.end(),
+         [&](const tiii& a, const tiii& b) { return (int64_t)get<0>(a) * get<1>(b) < (int64_t)get<1>(a) * get<0>(b); });
+
+    f[0] = qpow(n, m);
+    int64_t ans = 0;
+    for (auto [x, y, p] : a) {
+        erase(coef[p], n - coef[p]);
+        ans = (ans + f[m / 2] * x % mod * inv(y)) % mod;
+        coef[p]++;
+        insert(coef[p], n - coef[p]);
+    }
+    cout << ans * inv(qpow(n, m)) % mod << endl;
+    return;
+}
+
+int main() {
+    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    int _ = 1;
+    while (_--) solve();
+
+    return 0;
+}

QOJ/9529.cpp

@@ -0,0 +1,69 @@
+/**
+ * @file 9529.cpp
+ * @author Macesuted (i@macesuted.moe)
+ * @date 2024-10-26
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#include <bits/stdc++.h>
+using namespace std;
+
+#define endl '\n'
+
+#define maxn 1000005
+
+int64_t cnt[maxn], val[maxn], tot = 0, totVal = 0;
+
+void add(int p, int64_t v) {
+    tot += v, totVal += v * p;
+    for (int i = p; i < maxn; i += i & -i) cnt[i] += v, val[i] += v * p;
+    return;
+}
+int64_t sum(int p) {
+    int64_t ans = tot;
+    for (int i = p - 1; i; i -= i & -i) ans -= cnt[i];
+    return ans;
+}
+int64_t getAns(int p) {
+    int64_t ans = totVal;
+    for (int i = p - 1; i; i -= i & -i) ans -= val[i];
+    return ans;
+}
+int64_t solve(int64_t m) {
+    int l = 1, r = 1e6 + 1;
+    while (l + 1 < r) {
+        int mid = (l + r) >> 1;
+        (sum(mid) >= m ? l : r) = mid;
+    }
+    return getAns(l) - (sum(l) - m) * l;
+}
+
+int w[maxn], l[maxn], r[maxn];
+
+void solve(void) {
+    int n;
+    int64_t m, ans = 0, cur = 0;
+    cin >> n >> m;
+    for (int i = 1; i <= n; i++) cin >> w[i] >> l[i] >> r[i], m -= l[i], cur += (int64_t)l[i] * w[i], add(w[i], r[i] - l[i]);
+    ans = cur + solve(m);
+    for (int i = 1; i <= n; i++) {
+        m += l[i], cur -= (int64_t)l[i] * w[i], add(w[i], l[i] - r[i]);
+        add(w[i], m);
+        ans = max(ans, cur + solve(m));
+        add(w[i], -m);
+        m -= l[i], cur += (int64_t)l[i] * w[i], add(w[i], r[i] - l[i]);
+    }
+    cout << ans << endl;
+    return;
+}
+
+int main() {
+    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
+
+    int _ = 1;
+    while (_--) solve();
+
+    return 0;
+}