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Submission #417586

# Submission time Handle Problem Language Result Execution time Memory
417586 2021-06-04T02:03:16 Z flappybird Simurgh (IOI17_simurgh) C++14
30 / 100
 2748 ms 5916 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();
	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];
					}
				}
			}
		}
	};
	assert(cnt <= 3 * N);
	vector<ll> ans;
	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);
		}
	}
	for (i = 1; i < N; i++) if (isroyal[i]) ans.push_back(getline(i, sp[i][0]));
	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:114:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  114 |   for (m = 0; m < back[k].size(); k++) {
      |               ~~^~~~~~~~~~~~~~~~
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 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 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 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 7 ms 680 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 664 KB correct
17 Correct 5 ms 588 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 6 ms 672 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 4 ms 528 KB correct
25 Correct 2 ms 588 KB correct
26 Correct 4 ms 716 KB correct
27 Correct 3 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 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 7 ms 680 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 664 KB correct
17 Correct 5 ms 588 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 6 ms 672 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 4 ms 528 KB correct
25 Correct 2 ms 588 KB correct
26 Correct 4 ms 716 KB correct
27 Correct 3 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 2473 ms 2736 KB correct
35 Correct 2266 ms 2756 KB correct
36 Correct 1106 ms 2612 KB correct
37 Correct 19 ms 1356 KB correct
38 Correct 2454 ms 2728 KB correct
39 Correct 1749 ms 2632 KB correct
40 Correct 1047 ms 2500 KB correct
41 Correct 2447 ms 2716 KB correct
42 Correct 2339 ms 2724 KB correct
43 Correct 681 ms 2288 KB correct
44 Correct 455 ms 2008 KB correct
45 Correct 618 ms 2120 KB correct
46 Correct 355 ms 1860 KB correct
47 Correct 84 ms 1668 KB correct
48 Correct 6 ms 1356 KB correct
49 Incorrect 20 ms 1472 KB WA in grader: NO
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 396 KB correct
3 Incorrect 2748 ms 5916 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 332 KB correct
5 Correct 1 ms 332 KB correct
6 Correct 1 ms 332 KB correct
7 Correct 1 ms 332 KB correct
8 Correct 1 ms 332 KB correct
9 Correct 1 ms 332 KB correct
10 Correct 1 ms 336 KB correct
11 Correct 1 ms 332 KB correct
12 Correct 1 ms 332 KB correct
13 Correct 1 ms 332 KB correct
14 Correct 7 ms 680 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 664 KB correct
17 Correct 5 ms 588 KB correct
18 Correct 2 ms 588 KB correct
19 Correct 6 ms 672 KB correct
20 Correct 5 ms 588 KB correct
21 Correct 5 ms 588 KB correct
22 Correct 4 ms 588 KB correct
23 Correct 3 ms 588 KB correct
24 Correct 4 ms 528 KB correct
25 Correct 2 ms 588 KB correct
26 Correct 4 ms 716 KB correct
27 Correct 3 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 2473 ms 2736 KB correct
35 Correct 2266 ms 2756 KB correct
36 Correct 1106 ms 2612 KB correct
37 Correct 19 ms 1356 KB correct
38 Correct 2454 ms 2728 KB correct
39 Correct 1749 ms 2632 KB correct
40 Correct 1047 ms 2500 KB correct
41 Correct 2447 ms 2716 KB correct
42 Correct 2339 ms 2724 KB correct
43 Correct 681 ms 2288 KB correct
44 Correct 455 ms 2008 KB correct
45 Correct 618 ms 2120 KB correct
46 Correct 355 ms 1860 KB correct
47 Correct 84 ms 1668 KB correct
48 Correct 6 ms 1356 KB correct
49 Incorrect 20 ms 1472 KB WA in grader: NO
50 Halted 0 ms 0 KB -