Submission #1096537

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096537		arman_ferdous	Cultivation (JOI17_cultivation)	C++17	30 / 100	336 ms	262144 KiB

cultivation

#ifdef DeBuG
#include "debug.h"
#else
#include <bits/stdc++.h>
#define dbg(...)
#endif
using namespace std;

#define fi first
#define se second
#define pb push_back
#define sz(v) (int)(v).size()
#define all(v) begin(v),end(v)
#define rep(i,a,b) for (int i=(a);i<(b);++i)
using ll = long long; template <class T> using V = vector<T>;
using pii = pair<int,int>; using pll = pair<ll,ll>;

int R, C, N;

struct Rect {
    int x1, y1, x2, y2;
    Rect () {}

    void up () { x1 = max(x1 - 1, 1); }
    void dw () { x2 = min(x2 + 1, R); }
    void le () { y1 = max(y1 - 1, 1); }
    void ri () { y2 = min(y2 + 1, C); }
    void up (int k) { while (k--) up(); }
    void dw (int k) { while (k--) dw(); }
    void le (int k) { while (k--) le(); }
    void ri (int k) { while (k--) ri(); }
};

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> R >> C >> N;
    V<Rect> rect(N);
    for (int i = 0; i < N; ++i) {
        int x, y; cin >> x >> y;
        rect[i].x1 = rect[i].x2 = x;
        rect[i].y1 = rect[i].y2 = y;
    }

    int ans = R + C - 2;
    for (int u = 0; u < R; ++u) for (int d = 0; d < R; ++d) {
        V<Rect> a = rect;
        for (int i = 0; i < N; ++i) { a[i].up(u); a[i].dw(d); }
        
        int n1 = 0, n2 = 0, n3 = 0;
        V<int> pts[R + 1];
        for (int i = 1; i <= R; ++i) {
            for (int j = 0; j < N; ++j) if (a[j].x1 <= i && i <= a[j].x2) 
                pts[i].pb(a[j].y1);
            sort(all(pts[i]));
        }
        for (int i = 1; i <= R; ++i) {
            if (pts[i].empty()) { n1 = 1e9, n2 = 1e9; break; }
            n1 = max(n1, pts[i][0] - 1);
            n2 = max(n2, C - pts[i].back());
        }
        for (int i = 1; i <= R; ++i) {
            for (int j = 0; j + 1 < sz(pts[i]); ++j) {
                int x = pts[i][j] + n2, y = pts[i][j + 1] - n1;
                if (x + 1 < y) n3 = max(n3, y - x - 1);
            }
        }
        dbg(u, d, n1, n2, n3);
        ans = min(ans, u + d + n1 + n2 + n3);
    }
    cout << ans << "\n";
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20