Submission #813648

#	Time	Username	Problem	Language	Result	Execution time	Memory
813648		maomao90	Garden (JOI23_garden)	C++17	30 / 100	3076 ms	8376 KiB

garden

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 500005;
const int MAXD = 5005;

int n, m, d;
int p[MAXN], q[MAXN];
ii rs[MAXN];
int occ[MAXD * 2 + 5];
set<int> st;
multiset<int> gap;
int ans;

int calcgap(int r, int l) {
    if (r > l) {
        return r - l;
    }
    return r - l + d;
}
void insert(int v) {
    if (occ[v]++ > 0) {
        return;
    }
    auto ptr = st.insert(v).FI;
    if (SZ(st) == 1) {
        gap.insert(0);
        return;
    }
    auto prv = prev(st.end());
    if (ptr != st.begin()) {
        prv = prev(ptr);
    }
    auto nxt = next(ptr);
    if (nxt == st.end()) {
        nxt = st.begin();
    }
    if (prv == nxt) {
        gap.erase(gap.find(0));
    } else {
        gap.erase(gap.find(calcgap(*prv, *nxt)));
    }
    gap.insert(calcgap(*prv, *ptr));
    gap.insert(calcgap(*ptr, *nxt));
}
void remove(int v) {
    if (--occ[v] > 0) {
        return;
    }
    auto ptr = st.find(v);
    auto prv = prev(st.end());
    if (ptr != st.begin()) {
        prv = prev(ptr);
    }
    auto nxt = next(ptr);
    if (nxt == st.end()) {
        nxt = st.begin();
    }
    gap.erase(gap.find(calcgap(*prv, *ptr)));
    gap.erase(gap.find(calcgap(*ptr, *nxt)));
    if (prv == nxt) {
        gap.insert(0);
    } else {
        gap.insert(calcgap(*prv, *nxt));
    }
    st.erase(ptr);
}

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n >> m >> d;
    REP (i, 0, n) {
        cin >> p[i] >> q[i];
    }
    REP (i, 0, m) {
        cin >> rs[i].FI >> rs[i].SE;
    }
    sort(rs, rs + m);
    REP (i, m, 2 * m) {
        rs[i] = rs[i - m];
        rs[i].FI += d;
    }
    sort(p, p + n);
    REP (i, n, 2 * n) {
        p[i] = p[i - n] + d;
    }
    REP (i, 0, n) {
        insert(q[i]);
    }
    int rptr = 0, pptr = 0;
    ans = INF;
    REP (i, 0, d) {
        while (rs[rptr].FI < i) {
            rptr++;
        }
        while (p[pptr] < i) {
            pptr++;
        }
        int ptr = rptr + m - 1;
        RREP (j, i + d - 1, max(i, p[pptr + n - 1])) {
            while (ptr >= rptr && rs[ptr].FI > j) {
                insert(rs[ptr--].SE);
            }
            mnto(ans, (j - i + 1) * (*gap.begin() + 1));
        }
        while (ptr < rptr + m - 1) {
            remove(rs[++ptr].SE);
        }
    }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 6 / 6
• Subtask 3: 8 / 8
• Subtask 4: 16 / 16
• Subtask 5: 0 / 30
• Subtask 6: 0 / 25