Submission #1065874

#	Time	Username	Problem	Language	Result	Execution time	Memory
1065874		crafticat	Garden (JOI23_garden)	C++17	30 / 100	3075 ms	88328 KiB

garden

#include <bits/stdc++.h>

using namespace std;

#include <bits/stdc++.h>

#include <utility>
using namespace std;

using ll = long long;
using pi = pair<ll,ll>;
using pl = pair<ll,ll>;

#define temp(T) template<class T>
temp(T) using V = vector<T>;
using vi = V<ll>;
using vl = V<ll>;
using vvi = V<vi>;
using vpi = V<pi>;
using vb = V<bool>;
using vvb = V<vb>;
vi dx = {0,1,-1,0};
vi dy = {1,0,0,-1};

#define sz(x) x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define pb push_back
#define eb emplace_back
#define f first
#define s second

#define lb lower_bound
#define ub upper_bound

#define FOR(i,a,b) for (ll i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (ll i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)

using str = string;

const ll MOD = 1e9 + 7;
const ll BIG = 1e18;
const ll INF = 1e9 + 2;

temp(T) bool ckmin(T& a, const T& b) {
    return b < a ? a = b, 1 : 0; } // set a = min(a,b)
temp(T) bool ckmax(T& a, const T& b) {
    return a < b ? a = b, 1 : 0; } // set a = max(a,b)

void unsyncIO() { cin.tie(0)->sync_with_stdio(0); }
// FILE I/O
void setIn(str s) { freopen(s.c_str(),"r",stdin); }
void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void setIO(str s = "") {
    unsyncIO();
    if (sz(s)) setIn(s+".in"), setOut(s+".out"); // for USACO
}

#define read(x) ll x; cin >> x

temp(T) void pr(T x) {
    cout << to_string(x);
}
temp(T) void prln(T x) {
    cout << to_string(x) << "\n";
}


vi readV(ll n) {

    vi input(n);
    F0R(i,n)
        cin >> input[i];
    return input;
}

ll rand(ll a, ll b) {
    return a + rand() % (b - a + 1);
}

#define gen(x,a,b) ll x = rand(a,b)

temp(T) void moveAll(V<T> &a, V<T> &b) {
    each(x,b) {
        a.pb(x);
    }
    b.clear();
}

vi genArr(ll n, ll a, ll b) {
    vi generated(n);
    F0R(i,n) {
        generated[i] = rand(a,b);
    }
    return generated;
}

vvi genTree(ll n) {
    vvi g(n + 1);
    F0R(i,n) {
        gen(p,0,i);
        g[p].pb(i + 1);
        g[i + 1].pb(p);
    }

    return g;
}

vvb readGrid(ll a, ll b) {
    vvb grid(a + 2, vb(b + 2, true));

    F0R(i, a) {
        F0R(j, b) {
            bool k; cin >> k;
            grid[i + 1][j + 1] = k;
        }
    }
    return grid;
}

using tup = tuple<ll, ll, bool>; // x, y, changed
V<tup> pos;
ll d;

ll fix(ll t) {
    if (t == 0) return d;
    return (t + d) % d;
}

ll fix2(ll t) {
    return (t + d) % d;
}

ll get(ll x, ll l, bool first) {
    if (x == l && !first) return 0;
    return (x - l + d - 1) % d;
}

struct circle {
    multiset<ll> dataPolls;
    set<ll> clone;
    multiset<int> pq;

    pl get(int p) {
        auto it = dataPolls.lower_bound(p);
        if (it == dataPolls.end()) it = dataPolls.begin();
        int first = *it;
        if (it == dataPolls.begin()) it = dataPolls.end();
        it--;
        int sec = *it;
        return {first, sec};
    }


    void insert(ll x) {
        if (!dataPolls.empty()) {
            auto [a, b] = get(x);
            pq.erase(pq.find(fix2(a - b)));
            pq.emplace(fix2(a - x));
            pq.emplace(fix2(x - b));
        } else {
            pq.emplace(0);
        }
        dataPolls.ins(x);
    }
    void erase(ll x) {
        dataPolls.erase(dataPolls.find(x));
        if (dataPolls.empty()) {
            pq.clear();
            return;
        }
        auto [a,b] = get(x);
        pq.emplace(fix2(a - b));
        pq.erase(pq.find(fix2(a - x)));
        pq.erase(pq.find(fix2(x - b)));
    }

    ll query() {
        if (dataPolls.empty()) return 1;
        if (*dataPolls.begin() == *dataPolls.rbegin() == 1)
            return 1;

        return d - (*pq.rbegin() - 1);
    }
    void clear() {
        dataPolls.clear();
        pq.clear();
    }
};

set<tup> elm;
queue<tup> reqRemoved;
ll imp = 0;
circle c;

void addCur(tup x) {
    reqRemoved.emplace(x);
    imp += get<2>(x);
    c.insert(get<1>(x));
}
void remCur() {
    c.erase(get<1>(reqRemoved.front()));
    imp -= get<2>(reqRemoved.front());
    elm.ins(reqRemoved.front());
    reqRemoved.pop();
}

void removeFrom(ll l, ll r) {
    auto a = elm.lower_bound({l,-1,0});
    while (a != elm.end() && get<0>(*a) < r) {
        addCur(*a);
        elm.erase(a);
        a = elm.lower_bound({l,-1,0});
    }
}

void reset() {
    c.clear();
    elm.clear();
    imp = 0;
    reqRemoved = queue<tup>();
}

ll findOpt(ll w) {
    reset();

    ll best = INF;
    each(v, pos) {
        auto [x, y, changed] = v;
        if (changed) c.insert(y);
        elm.ins(v);
    }

    each(v, pos) {
        auto [x, y, changed] = v;

        ll l = x - w;

        if (l < 0) {
            l += d;
            removeFrom(l, 1e9);
            removeFrom(0, x);
        } else {
            removeFrom(l, x);
        }

        while (!reqRemoved.empty() && (fix(x - get<0>(reqRemoved.front()))) > w) {
            remCur();
        }
        if (imp == 0) ckmin(best, c.query());
    }
    return best;
}

ll eval(int i) {
    return ll(findOpt(i)) * ll(d - (i));
}

int main() {
    setIO();
    ll n, m; cin >> n >> m >> d;

    F0R(i, n) {
        ll x, y; cin >> x >> y;
        pos.pb({x % d,y % d,true});
    }
    F0R(i, m) {
        ll x, y; cin >> x >> y;
        pos.pb({x % d,y % d,false});
    }
    int BSIZE = 40;

    sort(all(pos));
    ll ans = ll(INF) * ll(INF) ;
    ll last = ans;
    int combo = 0;

    FOR(i,0, d) {
        ll v =ll(findOpt(i)) * ll(d - (i));
        if (v > d * d) break;
        if (i < d - BSIZE && (eval(i + BSIZE) < eval(i + BSIZE / 2)) && (eval(i + BSIZE / 2) < eval(i)) && eval(i + BSIZE) <= d* d) i += BSIZE / 2;

        if (v > last) combo++;
        else combo = 0;
        if (combo > 40) break;

        ckmin(ans, v);
        last = v;
    }
    cout << ans;

    return 0;
}

Compilation message (stderr)

garden.cpp: In member function 'll circle::query()':
garden.cpp:187:32: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
  187 |         if (*dataPolls.begin() == *dataPolls.rbegin() == 1)
      |             ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
garden.cpp: In function 'void setIn(str)':
garden.cpp:59:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
garden.cpp: In function 'void setOut(str)':
garden.cpp:60:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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