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Submission #435576

# Submission time Handle Problem Language Result Execution time Memory
435576 2021-06-23T12:45:10 Z grt Fountain Parks (IOI21_parks) C++17
5 / 100
 823 ms 155920 KB 
#include <bits/stdc++.h>
#include "parks.h"
#define ST first
#define ND second
#define PB push_back

using namespace std;
using ll = long long;
using pi = pair<int,int>;
using vi = vector<int>;

const int nax = 400 * 1000 + 10;
map<pi, int>fontain;
pi road[nax];
int n;
vi V[nax], V2[nax];
map<pi, int>pts;
pi inv[nax];
bool vis[nax];
int match[nax];

bool augument(int u) {
	vis[u] = true;
	for(int v : V[u]) {
		if(match[v] == -1) {
			match[u] = v;
			match[v] = u;
			return true;
		}
	}
	for(int v : V[u]) {
		if(!vis[match[v]] && augument(match[v])) {
			match[u] = v;
			match[v] = u;
			return true;
		}
	}
	return false;
}

void dfs(int x) {
	vis[x] = true;
	for(int nbh : V2[x]) if(!vis[nbh]) {
		dfs(nbh);
	}
}

int construct_roads(vi xx, vi yx) {
	for(int i = 0; i < (int)xx.size(); ++i) {
		fontain[{xx[i], yx[i]}] = i;
	}
	for(auto it : fontain) {
		auto [x, y] = it.ST;
		if(fontain.count({x + 2, y})) {
			road[n] = {it.ND, fontain[{x + 2, y}]};
			pts[{x + 1, y - 1}];
			pts[{x + 1, y + 1}];
			n++;
		}
		if(fontain.count({x, y + 2})) {
			road[n] = {it.ND, fontain[{x, y + 2}]};
			pts[{x - 1, y + 1}];
			pts[{x + 1, y + 1}];
			n++;
		}
	}
	int id = 0;
	for(auto &it : pts) {
		inv[id] = it.ST;
		it.ND = id++;
	}
	for(int i = 0; i < n; ++i) {
		V2[road[i].ST].PB(road[i].ND);
		V2[road[i].ND].PB(road[i].ST);
		int x1 = xx[road[i].ST], y1 = yx[road[i].ST];
		int x2 = xx[road[i].ND], y2 = yx[road[i].ND];
		if(x1 == x2) {
			int y = (y1 + y2) / 2;
			for(int x : {x1 - 1, x1 + 1}) {
				int nr = pts[{x, y}];
				V[i].emplace_back(n + nr);
				V[n + nr].emplace_back(i);
			}
		} else if(y1 == y2) {
			int x = (x1 + x2) / 2;
			for(int y : {y1 - 1, y1 + 1}) {
				int nr = pts[{x, y}];
				V[i].emplace_back(n + nr);
				V[n + nr].emplace_back(i);
			}
		}
	}
	dfs(0);
	for(int i = 0; i < (int)xx.size(); ++i) {
		if(!vis[i]) {
			return 0;
		}
	}
	for(int i = 0; i < n + id; ++i) {
		match[i] = -1;
	}
	while(true) {
		bool any = false;
		for(int i = 0; i < n + id; ++i) {
			vis[i] = false;
		}
		for(int i = 0; i < n + id; ++i) {
			if(match[i] == -1 && augument(i)) {
				any = true;
			}
		}
		if(!any) break;
	}
	for(int i = 0; i < n; ++i) {
		if(match[i] == -1) {
			return 0;
		}
	}
	vi u(n), v(n), a(n), b(n);
	for(int i = 0; i < n; ++i) {
		u[i] = road[i].ST;
		v[i] = road[i].ND;
		a[i] = inv[match[i] - n].ST;
		b[i] = inv[match[i] - n].ND;
	}
	build(u,v,a,b);
	return 1;
}

//int main() {
	//ios_base::sync_with_stdio(0);
	//cin.tie(0);
//}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct
17 Correct 12 ms 19068 KB Output is correct
18 Correct 11 ms 19020 KB Output is correct
19 Correct 13 ms 19096 KB Output is correct
20 Correct 12 ms 19072 KB Output is correct
21 Correct 12 ms 19020 KB Output is correct
22 Correct 14 ms 19020 KB Output is correct
23 Runtime error 491 ms 117820 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct
17 Correct 12 ms 19068 KB Output is correct
18 Correct 11 ms 19020 KB Output is correct
19 Correct 13 ms 19096 KB Output is correct
20 Correct 12 ms 19072 KB Output is correct
21 Correct 12 ms 19020 KB Output is correct
22 Correct 14 ms 19020 KB Output is correct
23 Runtime error 491 ms 117820 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct
17 Correct 12 ms 19084 KB Output is correct
18 Correct 12 ms 19020 KB Output is correct
19 Correct 13 ms 19120 KB Output is correct
20 Correct 823 ms 96188 KB Output is correct
21 Correct 742 ms 88360 KB Output is correct
22 Correct 718 ms 88388 KB Output is correct
23 Runtime error 548 ms 146064 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct
17 Runtime error 525 ms 155920 KB Execution killed with signal 11
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 19020 KB Output is correct
2 Correct 13 ms 19032 KB Output is correct
3 Correct 12 ms 19008 KB Output is correct
4 Correct 12 ms 19108 KB Output is correct
5 Correct 12 ms 19020 KB Output is correct
6 Correct 13 ms 19020 KB Output is correct
7 Correct 12 ms 19040 KB Output is correct
8 Correct 12 ms 19104 KB Output is correct
9 Correct 333 ms 62052 KB Output is correct
10 Correct 35 ms 23496 KB Output is correct
11 Correct 157 ms 42440 KB Output is correct
12 Correct 49 ms 25724 KB Output is correct
13 Correct 140 ms 35156 KB Output is correct
14 Correct 15 ms 19404 KB Output is correct
15 Correct 16 ms 19716 KB Output is correct
16 Correct 348 ms 61348 KB Output is correct
17 Correct 12 ms 19068 KB Output is correct
18 Correct 11 ms 19020 KB Output is correct
19 Correct 13 ms 19096 KB Output is correct
20 Correct 12 ms 19072 KB Output is correct
21 Correct 12 ms 19020 KB Output is correct
22 Correct 14 ms 19020 KB Output is correct
23 Runtime error 491 ms 117820 KB Execution killed with signal 11
24 Halted 0 ms 0 KB -