Submission #1042772

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042772		gyg	Pyramid Base (IOI08_pyramid_base)	C++17	70 / 100	5108 ms	178828 KiB

pyramid_base

#pragma GCC optimize("O3", "unroll-loops")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int MAX_N = 4e5 + 5, MAX_R = 1e6 + 5, INF = 1e18;
 
int r, c, k, n;
array<int, MAX_N> row1, col1, row2, col2, cost;
 
struct Node { int min, lazy; }; 
array<Node, 4 * MAX_R> st;
void propogate(int u) {
    st[2 * u].min += st[u].lazy, st[2 * u].lazy += st[u].lazy;
    st[2 * u + 1].min += st[u].lazy, st[2 * u + 1].lazy += st[u].lazy;
    st[u].lazy = 0;
}
void update(int l, int _r, int x, int u = 1, int lo = 1, int hi = r) {
    if (l <= lo && hi <= _r) { 
        st[u].min += x, st[u].lazy += x;
        return;
    }
    propogate(u);
    int mid = (lo + hi) / 2;
    if (l <= mid) update(l, _r, x, 2 * u, lo, mid);
    if (mid < _r) update(l, _r, x, 2 * u + 1, mid + 1, hi);
    st[u].min = min(st[2 * u].min, st[2 * u + 1].min);
}
int query(int l, int _r, int u = 1, int lo = 1, int hi = r) {
    if (_r < lo || hi < l) return INF;
    if (l <= lo && hi <= _r) return st[u].min;
    propogate(u);
    int mid = (lo + hi) / 2, ans = INF;
    if (l <= mid) ans = min(ans, query(l, _r, 2 * u, lo, mid));
    if (mid < _r) ans = min(ans, query(l, _r, 2 * u + 1, mid + 1, hi));
    return ans;
}
 
array<vector<int>, MAX_R> ins, del;   
bool check(int s) {
    Node zero = {0, 0};
    fill(st.begin(), st.end(), zero);
    for (int i = 1; i <= c; i++) ins[i].clear(), del[i].clear();
     
    for (int i = 1; i <= n; i++) {
        ins[max(col1[i] - s + 1, 1ll)].push_back(i);
        del[col2[i]].push_back(i);
    }
    
    bool prev = true;
    for (int col = 1; col <= c - s + 1; col++) {
        for (int i : ins[col])
            update(max(row1[i] - s + 1, 1ll), row2[i], cost[i]);
        
        if (prev && query(1, r - s + 1) <= k) return true;
        
        prev = del[col].size();
        for (int i : del[col])
            update(max(row1[i] - s + 1, 1ll), row2[i], -cost[i]);
    }
    return false;
}
 
int bin_search() {
    int lo = 1, hi = min(r, c);
    while (lo != hi) {
        int mid = ceil((lo + hi) / (double) 2);
        if (check(mid)) lo = mid;
        else hi = mid - 1;
    }
    if (!check(lo)) return 0;
    return lo;
}
 
signed main() {
    // freopen("pbs.in", "r", stdin), freopen("pbs.out", "w", stdout);
    cin.sync_with_stdio(false), cin.tie(0);
    cin >> r >> c >> k >> n;
    for (int i = 1; i <= n; i++) cin >> row1[i] >> col1[i] >> row2[i] >> col2[i] >> cost[i];
 
    int ans = bin_search();
    cout << ans << '\n';
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7
• Subtask 11: 7 / 7
• Subtask 12: 7 / 7
• Subtask 13: 0 / 10
• Subtask 14: 0 / 10
• Subtask 15: 0 / 10