Submission #1065754

#	Time	Username	Problem	Language	Result	Execution time	Memory
1065754		not_amir	Garden (JOI23_garden)	C++14	45 / 100	3100 ms	27340 KiB

garden

#include <bits/stdc++.h>
using namespace std;
 
#define pii pair<int, int>
#define F(x) ((x)<=0)?((x)+d):(x)

int main(){
	ios_base::sync_with_stdio(false), cin.tie(NULL);
	int n, m, d;
	cin >> n >> m >> d;
	vector<pii> pq(n), rs(m);
	vector<bool> req_x(d), req_y(d);
    vector<int> prv_s(d, -1);
    vector<vector<bool> > grid(d, vector<bool>(d));
    for(int i = 0; i < n; i++){
		int p, q;
		cin >> p >> q;
        req_x[p] = 1;
        req_y[q] = 1;
		pq[i] = {p, q};
	}
	for(int i = 0; i < m; i++){
		int r, s;
		cin >> r >> s;
        grid[r][s] = 1;
        prv_s[s] = r;
		rs[i] = {r, s};
	}
	int ans = d*d;
	vector<vector<int> > rx_s(2*d);
	for(int lx = 0; lx < d; lx++){
		for(int y = 0; y < d; y++){
			if(grid[(lx + d - 1) % d][y])
				prv_s[y] = lx + d - 1;
		}
		for(int y = 0; y < d; y++)
            if(prv_s[y] != -1) rx_s[prv_s[y]].push_back(y);
        vector<int> ry(d), prv_y(d, -1), nxt_y(d, -1);
        for(int i = 0; i < d; i++)
            ry[i] += req_y[i];
 	    int maxdiff = 0, rx = lx + d;
		while(rx > lx && !req_x[(rx-1) % d])
			for(int y : rx_s[--rx]) ry[y]++;
		vector<int> ry_w;
		for(int y = 0; y < d; y++)
            if(ry[y]) ry_w.push_back(y);
		for(int i = 0; i < ry_w.size(); i++){
			int a = ry_w[i];
			int b = ry_w[(i+1) % ry_w.size()];
			prv_y[b] = a;
			nxt_y[a] = b;
		}
		for(int y : ry_w)
			maxdiff = max(maxdiff, F(nxt_y[y] - y));
		for(;rx < lx + d;rx++){
			ans = min(ans, (d - (maxdiff - 1)) * (rx - lx));
			for(int y : rx_s[rx])
				if(--ry[y] == 0){
                    maxdiff = max(maxdiff, F(nxt_y[y] - prv_y[y]));
			        prv_y[nxt_y[y]] = prv_y[y];
			        nxt_y[prv_y[y]] = nxt_y[y];
                }
		}
        ans = min(ans, (d - (maxdiff-1)) * (rx - lx));
	}
	cout << ans << '\n';
}

Compilation message (stderr)

garden.cpp: In function 'int main()':
garden.cpp:39:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   39 |         for(int i = 0; i < d; i++)
      |         ^~~
garden.cpp:41:7: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   41 |       int maxdiff = 0, rx = lx + d;
      |       ^~~
garden.cpp:47:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for(int i = 0; i < ry_w.size(); i++){
      |                  ~~^~~~~~~~~~~~~

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