oj.uz

Submission #172545

# Submission time Handle Problem Language Result Execution time Memory
172545 2020-01-02T01:17:09 Z eggag32 Duathlon (APIO18_duathlon) C++17
28 / 100
 101 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];
ll cn[100005];
ll d[100005];
int id = 0;
ll 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("1.out", "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{
		//subtasks 3, 4, 5 (but 3 doesn't work)
		memset(vis1, 0, sizeof(vis1));
		memset(vis3, 0, sizeof(vis3));
		memset(d, 0LL, 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

# Verdict Execution time Memory 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 4 ms 2680 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 5 ms 2684 KB Output is correct
10 Correct 5 ms 2680 KB Output is correct
11 Correct 5 ms 2680 KB Output is correct
12 Correct 4 ms 2552 KB Output is correct
13 Correct 5 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 5 ms 2680 KB Output is correct
16 Correct 5 ms 2684 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 3 ms 2684 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Correct 5 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 4 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 5 ms 2680 KB Output is correct
33 Correct 4 ms 2680 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

# Verdict Execution time Memory 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 4 ms 2680 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 5 ms 2684 KB Output is correct
10 Correct 5 ms 2680 KB Output is correct
11 Correct 5 ms 2680 KB Output is correct
12 Correct 4 ms 2552 KB Output is correct
13 Correct 5 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 5 ms 2680 KB Output is correct
16 Correct 5 ms 2684 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 3 ms 2684 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Correct 5 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 4 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 5 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 6 ms 4216 KB Output is correct
37 Correct 6 ms 4216 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

# Verdict Execution time Memory Grader output
1 Incorrect 97 ms 10872 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4216 KB Output is correct
2 Correct 6 ms 4344 KB Output is correct
3 Correct 6 ms 4216 KB Output is correct
4 Correct 6 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 4344 KB Output is correct
9 Correct 6 ms 4348 KB Output is correct
10 Correct 6 ms 4316 KB Output is correct
11 Correct 6 ms 4216 KB Output is correct
12 Correct 6 ms 4216 KB Output is correct
13 Correct 6 ms 4216 KB Output is correct
14 Correct 6 ms 4216 KB Output is correct
15 Correct 6 ms 4344 KB Output is correct
16 Correct 6 ms 4220 KB Output is correct
17 Correct 6 ms 4344 KB Output is correct
18 Correct 6 ms 4316 KB Output is correct
19 Correct 6 ms 4344 KB Output is correct
20 Correct 7 ms 4344 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 70 ms 7928 KB Output is correct
2 Correct 70 ms 7852 KB Output is correct
3 Correct 73 ms 7928 KB Output is correct
4 Correct 73 ms 7932 KB Output is correct
5 Correct 78 ms 7924 KB Output is correct
6 Correct 91 ms 9524 KB Output is correct
7 Correct 89 ms 8860 KB Output is correct
8 Correct 79 ms 8696 KB Output is correct
9 Correct 80 ms 8312 KB Output is correct
10 Correct 82 ms 7928 KB Output is correct
11 Correct 72 ms 7928 KB Output is correct
12 Correct 76 ms 7844 KB Output is correct
13 Correct 72 ms 7928 KB Output is correct
14 Correct 62 ms 8000 KB Output is correct
15 Correct 60 ms 7800 KB Output is correct
16 Correct 59 ms 7416 KB Output is correct
17 Correct 50 ms 8300 KB Output is correct
18 Correct 54 ms 8304 KB Output is correct
19 Correct 49 ms 8172 KB Output is correct
20 Correct 50 ms 8188 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4344 KB Output is correct
2 Correct 6 ms 4216 KB Output is correct
3 Incorrect 6 ms 4344 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 7928 KB Output is correct
2 Correct 85 ms 7928 KB Output is correct
3 Incorrect 101 ms 7928 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory 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 4 ms 2680 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 5 ms 2684 KB Output is correct
10 Correct 5 ms 2680 KB Output is correct
11 Correct 5 ms 2680 KB Output is correct
12 Correct 4 ms 2552 KB Output is correct
13 Correct 5 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 5 ms 2680 KB Output is correct
16 Correct 5 ms 2684 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 3 ms 2684 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Correct 5 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 4 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 5 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 6 ms 4216 KB Output is correct
37 Correct 6 ms 4216 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

# Verdict Execution time Memory 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 4 ms 2680 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 5 ms 2684 KB Output is correct
10 Correct 5 ms 2680 KB Output is correct
11 Correct 5 ms 2680 KB Output is correct
12 Correct 4 ms 2552 KB Output is correct
13 Correct 5 ms 2680 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 5 ms 2680 KB Output is correct
16 Correct 5 ms 2684 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2680 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 5 ms 2680 KB Output is correct
23 Correct 3 ms 2684 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Correct 5 ms 2680 KB Output is correct
29 Correct 4 ms 2680 KB Output is correct
30 Correct 4 ms 2680 KB Output is correct
31 Correct 4 ms 2680 KB Output is correct
32 Correct 5 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2680 KB Output is correct
35 Correct 5 ms 2680 KB Output is correct
36 Correct 6 ms 4216 KB Output is correct
37 Correct 6 ms 4216 KB Output is correct
38 Incorrect 6 ms 4216 KB Output isn't correct
39 Halted 0 ms 0 KB -