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Submission #417609

# Submission time Handle Problem Language Result Execution time Memory
417609 2021-06-04T03:25:11 Z flappybird Simurgh (IOI17_simurgh) C++14
30 / 100
 2664 ms 5824 KB 
#include "simurgh.h"

#include <bits/stdc++.h>
#include <cassert>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;
typedef int ll;

#define MAX 1010
#define MAXS 10

ll N, M;
ll sp[MAX][MAXS];
ll depth[MAX];
vector<ll> adj[MAX], tree[MAX], back[MAX], ans[MAX];
vector<ll> query;
vector<ll> U, V;
ll vis[MAX];
bool ck[MAX];
ll isroyal[MAX];
ll treeres;
ll leaf[MAX];
ll adj2[MAX][MAX];
vector<ll> leafv;

void dfs(ll x = 0, ll p = -1, ll d = 0) {
	sp[x][0] = p;
	depth[x] = d;
	ll i;
	vis[x] = 1;
	for (i = 1; i < MAXS; i++) sp[x][i] = sp[sp[x][i - 1]][i - 1];
	for (auto v : adj[x]) if (!vis[v]) dfs(v, x, d + 1);
}
//{a, b}={c, d}인지 체크
bool chk(ll a, ll b, ll c, ll d) {
	if (a > b) swap(a, b);
	if (c > d) swap(c, d);
	return a == c && b == d;
}

ll getline(ll u, ll v) {
	ll i;
	for (i = 0; i < M; i++) if (chk(u, v, U[i], V[i])) return i;
	assert(0);
}

ll getline(ll i) {
	return getline(U[i], V[i]);
}

ll lca(ll u, ll v) {
	if (depth[u] != depth[v]) {
		if (depth[u] < depth[v]) swap(u, v);
		ll i;
		for (i = MAXS - 1; i >= 0; i--) if (depth[sp[u][i]] >= depth[v]) u = sp[u][i];
	}
	if (u == v) return u;
	ll i;
	for (i = MAXS - 1; i >= 0; i--) if (sp[u][i] != sp[v][i]) u = sp[u][i], v = sp[v][i];
	return sp[v][0];
}

ll dis(ll u, ll v) {
	return depth[u] + depth[v] - 2 * depth[lca(u, v)];
}

void erase(vector<ll>& v, ll a) {
	ll i;
	for (i = 0; i < v.size(); i++) if (v[i] == a) break;
	v.erase((v.begin() + i));
}

ll p(ll r, ll x) {
	if (lca(r, x) == x) {
		for (auto v : adj[x]) {
			if (lca(v, r) == v && lca(x, v) == x) return v;
		}
	}
	else return sp[x][0];
}

ll a(ll i) {
	if (sp[U[i]][0] == V[i]) return U[i];
	else return V[i];
}

//v is parent
std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	ll cnt = 0;
	N = n, M = u.size();
	if (M == N - 1) {
		ll i;
		vector<ll> v;
		for (i = 0; i < M; i++) v.push_back(i);
		return v;
	}
	ll i;
	for (i = 0; i < M; i++) adj[u[i]].push_back(v[i]), adj[v[i]].push_back(u[i]);
	dfs();
	for (i = 0; i < M; i++) {
		if (lca(u[i], v[i]) == u[i]) swap(u[i], v[i]);
		if (sp[u[i]][0] == v[i]) tree[u[i]].push_back(v[i]), tree[v[i]].push_back(u[i]);
		else back[u[i]].push_back(v[i]), back[v[i]].push_back(u[i]);
	}
	U = u, V = v;
	for (i = 0; i < N; i++) {
		for (auto v : tree[i]) {
			if (i < v) query.push_back(getline(i, v));
		}
	}
	cnt++;
	assert(cnt <= 29998);
	treeres = count_common_roads(query);
	ll k, m;
	for (k = 0; k < N; k++) isroyal[k] = -1;
	for (k = 0; k < N; k++) {
		for (m = 0; m < back[k].size(); k++) {
			ll v1 = k, v2 = back[k][m];
			ll l = lca(v1, v2);
			ll x = -1;
			for (i = v1; i != l; i = sp[i][0]) {
				if (isroyal[i] != -1) {
					x = i;
					break;
				}
			}
			for (i = v2; i != l; i = sp[i][0]) {
				if (isroyal[i] != -1) {
					x = i;
					break;
				}
			}
			if (x != -1) {
				query.push_back(getline(v1, v2));
				erase(query, getline(x, sp[x][0]));
				cnt++;
				assert(cnt <= 29998);
				ll r0 = treeres - count_common_roads(query) - isroyal[x];
				query.push_back(getline(x, sp[x][0]));
				for (i = v1; i != l; i = sp[i][0]) {
					if (isroyal[i] != -1) continue;
					erase(query, getline(i, sp[i][0]));
					cnt++;
					assert(cnt <= 29998);
					ll res = treeres - count_common_roads(query);
					if (res != r0) isroyal[i] = 1;
					else isroyal[i] = 0;
					query.push_back(getline(i, sp[i][0]));
				}
				for (i = v2; i != l; i = sp[i][0]) {
					if (isroyal[i] != -1) continue;
					erase(query, getline(i, sp[i][0]));
					cnt++;
					assert(cnt <= 29998);
					ll res = treeres - count_common_roads(query);
					if (res != r0) isroyal[i] = 1;
					else isroyal[i] = 0;
					query.push_back(getline(i, sp[i][0]));
				}
				erase(query, getline(v1, v2));
			}
			else {
				query.push_back(getline(v1, v2));
				map<ll, ll> mp;
				for (ll j = v1; (j != l); j = sp[j][0]) {
					ll e = getline(j, sp[j][0]);
					erase(query, e);
					cnt++;
					assert(cnt <= 29998);
					ll res = count_common_roads(query) - treeres;
					mp[j] = res;
					query.push_back(e);
				}
				for (ll j = v2; (j != l); j = sp[j][0]) {
					ll e = getline(j, sp[j][0]);
					erase(query, e);
					cnt++;
					assert(cnt <= 29998);
					ll res = count_common_roads(query) - treeres;
					mp[j] = res;
					query.push_back(e);
				}
				erase(query, getline(v1, v2));
				set<ll> st;
				for (ll j = v1; (j != l); j = sp[j][0]) st.insert(mp[j]);
				for (ll j = v2; (j != l); j = sp[j][0]) st.insert(mp[j]);
				if (st.size() == 1) {
					if (*st.begin() >= 0) {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 0;
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 0;
					}
					else {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 1;
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 1;
					}
				}
				else {
					if (*st.begin() == -1) {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = -mp[j];
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = -mp[j];
					}
					else {
						for (ll j = v1; (j != l); j = sp[j][0]) isroyal[j] = 1 - mp[j];
						for (ll j = v2; (j != l); j = sp[j][0]) isroyal[j] = 1 - mp[j];
					}
				}
			}
		}
	};
	for (i = 1; i < N; i++) if (isroyal[i]) isroyal[i] = 1;
	assert(cnt <= 3 * N);
	vector<ll> ans;
	for (i = 1; i < N; i++) if (isroyal[i] == 1) ans.push_back(getline(i, sp[i][0]));
	assert(ans.size() <= treeres);
	for (i = 0; i < N; i++) {
		for (auto x : adj[i]) {
			if (p(i, x) == i) continue;
			if (adj2[x][i]) continue;
			erase(query, getline(x, p(i, x)));
			ll e = getline(i, x);
			query.push_back(e);
			cnt++;
			assert(cnt <= 29998);
			ll res = count_common_roads(query) + isroyal[a(getline(x, p(i, x)))] - treeres;
			query.push_back(getline(x, p(i, x)));
			erase(query, e);
			adj2[i][x] = adj2[x][i] = 1;
			if (res == 1) ans.push_back(e);
		}
	}
	sort(ans.begin(), ans.end());
	ans.erase(unique(ans.begin(), ans.end()), ans.end());
	return ans;
}

Compilation message

simurgh.cpp: In function 'void erase(std::vector<int>&, ll)':
simurgh.cpp:72:16: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |  for (i = 0; i < v.size(); i++) if (v[i] == a) break;
      |              ~~^~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:120:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |   for (m = 0; m < back[k].size(); k++) {
      |               ~~^~~~~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from simurgh.cpp:4:
simurgh.cpp:217:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'int'} [-Wsign-compare]
  217 |  assert(ans.size() <= treeres);
      |         ~~~~~~~~~~~^~~~~~~~~~
simurgh.cpp: In function 'll p(ll, ll)':
simurgh.cpp:83:1: warning: control reaches end of non-void function [-Wreturn-type]
   83 | }
      | ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 420 KB correct
5 Correct 1 ms 400 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 404 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 400 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 420 KB correct
5 Correct 1 ms 400 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 404 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 400 KB correct
14 Correct 7 ms 652 KB correct
15 Correct 9 ms 664 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 664 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 5 ms 588 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 716 KB correct
22 Correct 5 ms 584 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 3 ms 588 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 4 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 3 ms 588 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 420 KB correct
5 Correct 1 ms 400 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 404 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 400 KB correct
14 Correct 7 ms 652 KB correct
15 Correct 9 ms 664 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 664 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 5 ms 588 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 716 KB correct
22 Correct 5 ms 584 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 3 ms 588 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 4 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 3 ms 588 KB correct
34 Correct 2393 ms 2800 KB correct
35 Correct 2230 ms 2768 KB correct
36 Correct 1120 ms 2504 KB correct
37 Correct 15 ms 1356 KB correct
38 Correct 2373 ms 2896 KB correct
39 Correct 1726 ms 2672 KB correct
40 Correct 1073 ms 2504 KB correct
41 Correct 2392 ms 2796 KB correct
42 Correct 2300 ms 2812 KB correct
43 Correct 704 ms 2308 KB correct
44 Correct 455 ms 2008 KB correct
45 Correct 628 ms 2124 KB correct
46 Correct 350 ms 1944 KB correct
47 Correct 85 ms 1604 KB correct
48 Correct 6 ms 1356 KB correct
49 Runtime error 7 ms 844 KB Execution killed with signal 6
50 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Incorrect 2664 ms 5824 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Correct 1 ms 332 KB correct
4 Correct 1 ms 420 KB correct
5 Correct 1 ms 400 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 404 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 332 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 400 KB correct
14 Correct 7 ms 652 KB correct
15 Correct 9 ms 664 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 664 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 5 ms 588 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 716 KB correct
22 Correct 5 ms 584 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 3 ms 588 KB correct
25 Correct 1 ms 588 KB correct
26 Correct 3 ms 588 KB correct
27 Correct 4 ms 588 KB correct
28 Correct 2 ms 588 KB correct
29 Correct 1 ms 588 KB correct
30 Correct 3 ms 588 KB correct
31 Correct 3 ms 588 KB correct
32 Correct 3 ms 588 KB correct
33 Correct 3 ms 588 KB correct
34 Correct 2393 ms 2800 KB correct
35 Correct 2230 ms 2768 KB correct
36 Correct 1120 ms 2504 KB correct
37 Correct 15 ms 1356 KB correct
38 Correct 2373 ms 2896 KB correct
39 Correct 1726 ms 2672 KB correct
40 Correct 1073 ms 2504 KB correct
41 Correct 2392 ms 2796 KB correct
42 Correct 2300 ms 2812 KB correct
43 Correct 704 ms 2308 KB correct
44 Correct 455 ms 2008 KB correct
45 Correct 628 ms 2124 KB correct
46 Correct 350 ms 1944 KB correct
47 Correct 85 ms 1604 KB correct
48 Correct 6 ms 1356 KB correct
49 Runtime error 7 ms 844 KB Execution killed with signal 6
50 Halted 0 ms 0 KB -