oj.uz

답안 #172542

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
172542 2020-01-02T01:03:17 Z eggag32 철인 이종 경기 (APIO18_duathlon) C++17
28 / 100
 109 ms 10872 KB 
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define debug(x) cerr << #x << ": " << x << endl;
#define debug2(x, y) debug(x) debug(y);
#define repn(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(i, a) for(int i = 0; i < (int)(a); i++)
#define all(v) v.begin(), v.end() 
#define mp make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define sq(x) ((x) * (x))

template<class T> T gcd(T a, T b){ return ((b == 0) ? a : gcd(b, a % b)); }

ll n, m;
vi vis2;
vi g[100005];

bool dfs(int cur, int mid, int fin, bool fnd, vi vis){
	vis[cur] = 1;
	if(cur == mid) fnd = 1;
	if(cur == fin){
		if(fnd) return 1;
		return 0;
	}
	int ret = 0;
	for(int u : g[cur]) if(!vis[u]){
		ret |= dfs(u, mid, fin, fnd, vis);
		if(ret) break;
	}
	return ret;
}

bool check(int st, int mid, int fin){
	vis2.assign(n, 0);
	return dfs(st, mid, fin, 0, vis2);
}

ll ans1 = 0;
int vis1[100005];
int vis3[100005];
int ind[100005];
int cn[100005];
ll d[100005];
int id = 0, cc = 0;

void dfs1(int cur){
	//initial traversal to compute the subtree sizes
	vis1[cur] = 1;
	ind[cur] = id;
	cc++;
	d[cur] = 1;
	for(int u : g[cur]) if(!vis1[u]){
		dfs1(u);
		d[cur] += d[u];
	}
}	

void dfs2(int cur){
	vis3[cur] = 1;
	ll sm = 0;
	for(int u : g[cur]) if(!vis3[u]){
		ans1 += (ll)(d[u] * (cn[ind[cur]] - d[u] - 1));
		sm += d[u];
	}
	ans1 += (ll)((cn[ind[cur]] - d[cur]) * sm);
	for(int u : g[cur]) if(!vis3[u]) dfs2(u);
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	//freopen("input.in", "r", stdin);
	//freopen("output.out", "w", stdout);
	cin >> n >> m;
	rep(i, m){
		int a, b;
		cin >> a >> b;
		a--, b--;
		g[a].pb(b);
		g[b].pb(a);
	}
	if(n <= 10 && m <= 100){
		//first subtask
		ll ans = 0;
		rep(i, n) repn(k, i + 1, n) rep(j, n) if(j != i && j != k) if(check(i, j, k)) ans += 2;
		//cout << "Slow: ";
		cout << ans << endl;
	}
	else{
		memset(vis1, 0, sizeof(vis1));
		memset(vis3, 0, sizeof(vis3));
		memset(d, 0, sizeof(d));
		rep(i, n)if(!vis1[i]){
			cc = 0;
			dfs1(i);
			cn[id] = cc;
			id++;
		}
		rep(i, n) if(!vis3[i]) dfs2(i);
		cout << ans1 << endl;
	}
	return 0;
}
/*
Things to look out for:
	- Integer overflows
	- Array bounds
	- Special cases
Be careful!
*/

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 6 ms 2652 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 6 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 1 ms 2680 KB Output is correct
11 Correct 4 ms 2808 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 5 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 9 ms 2652 KB Output is correct
17 Correct 3 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2684 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2808 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2728 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2652 KB Output is correct
27 Correct 5 ms 2680 KB Output is correct
28 Correct 4 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 5 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 3 ms 2680 KB Output is correct
33 Correct 4 ms 2684 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 6 ms 2652 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 6 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 1 ms 2680 KB Output is correct
11 Correct 4 ms 2808 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 5 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 9 ms 2652 KB Output is correct
17 Correct 3 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2684 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2808 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2728 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2652 KB Output is correct
27 Correct 5 ms 2680 KB Output is correct
28 Correct 4 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 5 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 3 ms 2680 KB Output is correct
33 Correct 4 ms 2684 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 5 ms 4216 KB Output is correct
37 Correct 6 ms 4344 KB Output is correct
38 Incorrect 6 ms 4216 KB Output isn't correct
39 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 97 ms 10872 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4344 KB Output is correct
2 Correct 7 ms 4344 KB Output is correct
3 Correct 6 ms 4344 KB Output is correct
4 Correct 7 ms 4344 KB Output is correct
5 Correct 6 ms 4344 KB Output is correct
6 Correct 6 ms 4344 KB Output is correct
7 Correct 6 ms 4344 KB Output is correct
8 Correct 6 ms 4348 KB Output is correct
9 Correct 6 ms 4344 KB Output is correct
10 Correct 6 ms 4344 KB Output is correct
11 Correct 6 ms 4344 KB Output is correct
12 Correct 6 ms 4344 KB Output is correct
13 Correct 6 ms 4348 KB Output is correct
14 Correct 6 ms 4344 KB Output is correct
15 Correct 6 ms 4248 KB Output is correct
16 Correct 6 ms 4344 KB Output is correct
17 Correct 6 ms 4344 KB Output is correct
18 Correct 6 ms 4344 KB Output is correct
19 Correct 6 ms 4344 KB Output is correct
20 Correct 6 ms 4344 KB Output is correct

Subtask #5
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 86 ms 7988 KB Output is correct
2 Correct 83 ms 7908 KB Output is correct
3 Correct 109 ms 7928 KB Output is correct
4 Correct 83 ms 7900 KB Output is correct
5 Correct 79 ms 7928 KB Output is correct
6 Correct 103 ms 9464 KB Output is correct
7 Correct 90 ms 8952 KB Output is correct
8 Correct 92 ms 8568 KB Output is correct
9 Correct 93 ms 8312 KB Output is correct
10 Correct 84 ms 7928 KB Output is correct
11 Correct 80 ms 9080 KB Output is correct
12 Correct 80 ms 9080 KB Output is correct
13 Correct 78 ms 9080 KB Output is correct
14 Correct 78 ms 9004 KB Output is correct
15 Correct 65 ms 8696 KB Output is correct
16 Correct 43 ms 7860 KB Output is correct
17 Correct 53 ms 9428 KB Output is correct
18 Correct 50 ms 9456 KB Output is correct
19 Correct 56 ms 9436 KB Output is correct
20 Correct 54 ms 9464 KB Output is correct

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4316 KB Output is correct
2 Correct 6 ms 4216 KB Output is correct
3 Incorrect 6 ms 4216 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 7996 KB Output is correct
2 Correct 86 ms 7824 KB Output is correct
3 Incorrect 93 ms 7800 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 6 ms 2652 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 6 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 1 ms 2680 KB Output is correct
11 Correct 4 ms 2808 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 5 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 9 ms 2652 KB Output is correct
17 Correct 3 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2684 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2808 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2728 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2652 KB Output is correct
27 Correct 5 ms 2680 KB Output is correct
28 Correct 4 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 5 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 3 ms 2680 KB Output is correct
33 Correct 4 ms 2684 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 5 ms 4216 KB Output is correct
37 Correct 6 ms 4344 KB Output is correct
38 Incorrect 6 ms 4216 KB Output isn't correct
39 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Correct 4 ms 2680 KB Output is correct
3 Correct 4 ms 2680 KB Output is correct
4 Correct 6 ms 2652 KB Output is correct
5 Correct 4 ms 2680 KB Output is correct
6 Correct 4 ms 2680 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 6 ms 2680 KB Output is correct
9 Correct 4 ms 2680 KB Output is correct
10 Correct 1 ms 2680 KB Output is correct
11 Correct 4 ms 2808 KB Output is correct
12 Correct 4 ms 2680 KB Output is correct
13 Correct 4 ms 2680 KB Output is correct
14 Correct 5 ms 2680 KB Output is correct
15 Correct 4 ms 2808 KB Output is correct
16 Correct 9 ms 2652 KB Output is correct
17 Correct 3 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2684 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2808 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2728 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 5 ms 2652 KB Output is correct
27 Correct 5 ms 2680 KB Output is correct
28 Correct 4 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 5 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 3 ms 2680 KB Output is correct
33 Correct 4 ms 2684 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 5 ms 4216 KB Output is correct
37 Correct 6 ms 4344 KB Output is correct
38 Incorrect 6 ms 4216 KB Output isn't correct
39 Halted 0 ms 0 KB -