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답안 #417600

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417600 2021-06-04T02:26:04 Z flappybird Simurgh (IOI17_simurgh) C++14
30 / 100
 2706 ms 5696 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];
					}
				}
			}
		}
	};
	for (i = 0; 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: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++) {
      |               ~~^~~~~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from simurgh.cpp:4:
simurgh.cpp:211:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'int'} [-Wsign-compare]
  211 |  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

# 결과 실행 시간 메모리 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 332 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

# 결과 실행 시간 메모리 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 332 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 6 ms 588 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 588 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 4 ms 660 KB correct
22 Correct 3 ms 588 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 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 640 KB correct
33 Correct 3 ms 588 KB correct

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 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 332 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 6 ms 588 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 588 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 4 ms 660 KB correct
22 Correct 3 ms 588 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 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 640 KB correct
33 Correct 3 ms 588 KB correct
34 Correct 2383 ms 2604 KB correct
35 Correct 2225 ms 2628 KB correct
36 Correct 1100 ms 2368 KB correct
37 Correct 15 ms 1356 KB correct
38 Correct 2381 ms 2684 KB correct
39 Correct 1732 ms 2504 KB correct
40 Correct 1042 ms 2368 KB correct
41 Correct 2372 ms 2592 KB correct
42 Correct 2298 ms 2596 KB correct
43 Correct 677 ms 2092 KB correct
44 Correct 465 ms 1916 KB correct
45 Correct 603 ms 1988 KB correct
46 Correct 369 ms 2000 KB correct
47 Correct 85 ms 1584 KB correct
48 Correct 6 ms 1356 KB correct
49 Runtime error 6 ms 844 KB Execution killed with signal 6
50 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB correct
2 Correct 1 ms 332 KB correct
3 Incorrect 2706 ms 5696 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 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 332 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 6 ms 588 KB correct
15 Correct 7 ms 588 KB correct
16 Correct 7 ms 588 KB correct
17 Correct 5 ms 588 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 4 ms 660 KB correct
22 Correct 3 ms 588 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 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 640 KB correct
33 Correct 3 ms 588 KB correct
34 Correct 2383 ms 2604 KB correct
35 Correct 2225 ms 2628 KB correct
36 Correct 1100 ms 2368 KB correct
37 Correct 15 ms 1356 KB correct
38 Correct 2381 ms 2684 KB correct
39 Correct 1732 ms 2504 KB correct
40 Correct 1042 ms 2368 KB correct
41 Correct 2372 ms 2592 KB correct
42 Correct 2298 ms 2596 KB correct
43 Correct 677 ms 2092 KB correct
44 Correct 465 ms 1916 KB correct
45 Correct 603 ms 1988 KB correct
46 Correct 369 ms 2000 KB correct
47 Correct 85 ms 1584 KB correct
48 Correct 6 ms 1356 KB correct
49 Runtime error 6 ms 844 KB Execution killed with signal 6
50 Halted 0 ms 0 KB -