Submission #783037

#TimeUsernameProblemLanguageResultExecution timeMemory
783037RushBLIS (INOI20_lis)C++17
100 / 100
1084 ms43152 KiB
#include <bits/stdc++.h> using namespace std; #define FOR(i, a, b) for (int i = (a); i < (b); i++) using ar = array<int, 2>; const int INF = 1ll << 30; const int N = 1e6 + 6; int n, x[N], p[N], q, ans[N], S[4 * N], delta[4 * N]; ar M[1500], a[N], b[N]; void add(int v, int l, int r, int L, int R, int d) { if (R <= l || r <= L) return; if (L <= l && r <= R) { delta[v] += d, S[v] += d; return; } int m = l + r >> 1; add(v << 1, l, m, L, R, d), add(v << 1 | 1, m, r, L, R, d); S[v] = min(S[v << 1], S[v << 1 | 1]) + delta[v]; } int find(int v, int l, int r) { if (l + 1 == r) { S[v] = INF; if (l + 1 != q) add(1, 0, q, l + 1, q, -1); return l; } int m = l + r >> 1, x; if (S[v << 1 | 1] <= S[v << 1]) x = find(v << 1 | 1, m, r); else x = find(v << 1, l, m); S[v] = min(S[v << 1], S[v << 1 | 1]) + delta[v]; return x; } void seq() { FOR(i, 0, q) add(1, 0, q, i, i + 1, p[i]); FOR(i, 0, q) { int t = find(1, 0, q); a[i][0] = t, a[i][1] = x[t]; } } void solve() { while (true) { ar lis = {0, INF}; fill(M, M + 1500, lis); FOR(i, 0, q) { ar p = *max_element(M, M + a[i][1]); M[a[i][1]] = max(M[a[i][1]], ar{p[0] + 1, min(p[1], -a[i][0])}); } lis = *max_element(M, M + 1500); for (int i = q - 1; i >= -lis[1]; i--) ans[i] = lis[0]; if (!lis[1]) return; int ptr = 0; FOR(i, 0, q) if (a[i][0] < -lis[1]) b[ptr++] = a[i]; q = ptr; copy(b, b + ptr, a); } } signed main() { ios::sync_with_stdio(0), cin.tie(0); cin >> q; int tq = q; vector<int> X; FOR(i, 0, q) { cin >> p[i] >> x[i]; X.push_back(x[i]); } sort(X.begin(), X.end()); X.resize(unique(X.begin(), X.end()) - X.begin()); FOR(i, 0, q) x[i] = lower_bound(X.begin(), X.end(), x[i]) - X.begin() + 1; seq(), solve(); FOR(i, 0, tq) cout << ans[i] << '\n'; }

Compilation message (stderr)

Main.cpp: In function 'void add(int, int, int, int, int, int)':
Main.cpp:16:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   16 |         int m = l + r >> 1;
      |                 ~~^~~
Main.cpp: In function 'int find(int, int, int)':
Main.cpp:26:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   26 |         int m = l + r >> 1, x;
      |                 ~~^~~
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