oj.uz

Submission #815300

# Submission time Handle Problem Language Result Execution time Memory
815300 2023-08-08T14:04:18 Z I_Love_EliskaM_ Fountain Parks (IOI21_parks) C++17
5 / 100
 539 ms 29032 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for(int i=0;i<n;++i)
#define pb push_back
#define all(x) x.begin(), x.end()
#define pi pair<int,int>
#define f first
#define s second

struct DSU {
	vector<int> p,sz;
	int tot;
	DSU(int n) {
		forn(i,n) p.pb(i), sz.pb(1);
		tot=n;
	}
	int get(int u) {
		return p[u]==u?u:get(p[u]);
	}
	void uni(int u, int v) {
		u=get(u), v=get(v);
		if (sz[u]<sz[v]) swap(u,v);
		sz[u]+=sz[v];
		p[v]=u;
		--tot;
	}
};

int p3(vector<int> x, vector<int> y) {

	int n=x.size();
	vector<int> u,v,a,b;
	map<pi,int> m;
	forn(i,n) m[{x[i],y[i]}]=i;
	DSU dsu(n);

	vector<pi> z1={{0,-2},{0,2}};
	vector<pi> z2={{-2,0},{2,0}};
	forn(i,n) {
		int f=x[i], s=y[i];
		for(auto&x:z1) {
			if (m.count({f+x.f,s+x.s})) {
				if (i<m[{f+x.f,s+x.s}]) {
					if (dsu.get(i)==dsu.get(m[{f+x.f,s+x.s}])) continue;
					dsu.uni(i,m[{f+x.f,s+x.s}]);
					u.pb(i), v.pb(m[{f+x.f,s+x.s}]);
				}
			}
		}
	}
	forn(i,n) {
		int f=x[i], s=y[i];
		for(auto&x:z2) {
			if (m.count({f+x.f,s+x.s})) {
				if (i<m[{f+x.f,s+x.s}]) {
					if (dsu.get(i)==dsu.get(m[{f+x.f,s+x.s}])) continue;
					dsu.uni(i,m[{f+x.f,s+x.s}]);
					u.pb(i), v.pb(m[{f+x.f,s+x.s}]);
				}
			}
		}
	}
	if (u.size()!=n-1) return 0;

	forn(i,n-1) {
		int x1=x[u[i]], y1=y[u[i]];
		int x2=x[v[i]], y2=y[v[i]];
		if (x1==x2) {
			if (x1==2) {
				a.pb(1);
				b.pb(max(y1,y2)-1);
			} else if (x1==6) {
				a.pb(7);
				b.pb(max(y1,y2)-1);
			} else {
				if (max(y1,y2)%4) {
					a.pb(3);
					b.pb(max(y1,y2)-1);
				} else {
					a.pb(5);
					b.pb(max(y1,y2)-1);
				}
			}
		} else {
			if ((max(x1,x2)+y1)%4) {
				a.pb(5);
				b.pb(y1+1);
			} else {
				a.pb(3);
				b.pb(y1-1);
			}
		}
	}
	build(u,v,a,b);
	return 1;
}

int construct_roads(vector<int> x, vector<int> y) {
	int mx=0; for(auto&v:x) mx=max(mx,v);
	if (mx<=6) return p3(x,y);

	int n=x.size();
	vector<int> u,v,a,b;
	map<pi,int> m;
	forn(i,n) m[{x[i],y[i]}]=i;
	DSU dsu(n);

	vector<pi> z={{-2,0},{2,0},{0,-2},{0,2}};
	forn(i,n) {
		int f=x[i], s=y[i];
		for(auto&x:z) {
			if (m.count({f+x.f,s+x.s})) {
				if (i<m[{f+x.f,s+x.s}]) {
					if (dsu.get(i)==dsu.get(m[{f+x.f,s+x.s}])) continue;
					dsu.uni(i,m[{f+x.f,s+x.s}]);
					u.pb(i), v.pb(m[{f+x.f,s+x.s}]);
				}
			}
		}
	}
	if (u.size()!=n-1) return 0;
	
	forn(i,n-1) {
		int x1=x[u[i]], y1=y[u[i]];
		int x2=x[v[i]], y2=y[v[i]];
		if (x1==x2) {
			if ((max(y1,y2)+x1)%4) {
				a.pb(x1+1);
				b.pb(max(y1,y2)-1);
			} else {
				a.pb(x1-1);
				b.pb(max(y1,y2)-1);
			}
		} else {
			if ((max(x1,x2)+y1)%4) {
				a.pb(max(x1,x2)-1);
				b.pb(y1-1);
			} else {
				a.pb(max(x1,x2)-1);
				b.pb(y1+1);
			}
		}
	}
	build(u,v,a,b);
	return 1;
}

Compilation message

parks.cpp: In function 'int p3(std::vector<int>, std::vector<int>)':
parks.cpp:64:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   64 |  if (u.size()!=n-1) return 0;
      |      ~~~~~~~~^~~~~
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:122:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  122 |  if (u.size()!=n-1) return 0;
      |      ~~~~~~~~^~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 1 ms 296 KB Tree (a[4], b[4]) = (5, 7) is not adjacent to edge between u[4]=0 @(4, 6) and v[4]=5 @(2, 6)
20 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 1 ms 296 KB Tree (a[4], b[4]) = (5, 7) is not adjacent to edge between u[4]=0 @(4, 6) and v[4]=5 @(2, 6)
20 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct
17 Correct 1 ms 300 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 438 ms 27372 KB Output is correct
21 Correct 451 ms 27404 KB Output is correct
22 Correct 496 ms 27392 KB Output is correct
23 Correct 372 ms 23440 KB Output is correct
24 Correct 281 ms 18076 KB Output is correct
25 Correct 464 ms 20364 KB Output is correct
26 Correct 422 ms 20276 KB Output is correct
27 Correct 484 ms 27380 KB Output is correct
28 Correct 454 ms 27524 KB Output is correct
29 Correct 530 ms 27576 KB Output is correct
30 Correct 529 ms 27420 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 23 ms 2672 KB Output is correct
33 Correct 107 ms 9524 KB Output is correct
34 Correct 416 ms 27388 KB Output is correct
35 Correct 13 ms 1492 KB Output is correct
36 Correct 81 ms 5636 KB Output is correct
37 Correct 180 ms 10484 KB Output is correct
38 Correct 161 ms 11688 KB Output is correct
39 Correct 242 ms 15540 KB Output is correct
40 Correct 316 ms 19456 KB Output is correct
41 Correct 417 ms 23500 KB Output is correct
42 Correct 539 ms 27432 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Incorrect 1 ms 212 KB Tree (a[0], b[0]) = (5, 3) is not adjacent to edge between u[0]=0 @(2, 2) and v[0]=1 @(4, 2)
45 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct
17 Correct 421 ms 27456 KB Output is correct
18 Correct 411 ms 27584 KB Output is correct
19 Correct 478 ms 27520 KB Output is correct
20 Correct 530 ms 26928 KB Output is correct
21 Correct 446 ms 24184 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 57 ms 5220 KB Output is correct
24 Correct 31 ms 2484 KB Output is correct
25 Correct 125 ms 7760 KB Output is correct
26 Correct 236 ms 12340 KB Output is correct
27 Correct 219 ms 14232 KB Output is correct
28 Correct 296 ms 17816 KB Output is correct
29 Correct 390 ms 20684 KB Output is correct
30 Correct 481 ms 24076 KB Output is correct
31 Correct 505 ms 27420 KB Output is correct
32 Incorrect 508 ms 29032 KB Tree (a[159996], b[159996]) = (5, 30183) is not adjacent to edge between u[159996]=2 @(4, 30182) and v[159996]=134374 @(2, 30182)
33 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 152 ms 15012 KB Output is correct
10 Correct 11 ms 1976 KB Output is correct
11 Correct 67 ms 8312 KB Output is correct
12 Correct 16 ms 2804 KB Output is correct
13 Correct 45 ms 5396 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 436 KB Output is correct
16 Correct 154 ms 15004 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Incorrect 1 ms 296 KB Tree (a[4], b[4]) = (5, 7) is not adjacent to edge between u[4]=0 @(4, 6) and v[4]=5 @(2, 6)
20 Halted 0 ms 0 KB -