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Submission #50063

# Submission time Handle Problem Language Result Execution time Memory
50063 2018-06-07T09:01:20 Z tmwilliamlin168 Duathlon (APIO18_duathlon) C++14
31 / 100
 219 ms 28080 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int mxN=1e5;
int n, m, dt=1, tin[mxN], low[mxN], st[mxN], sth, bccI;
vector<int> adj1[mxN], adj2[2*mxN];
ll sz[2*mxN], n2, ans;

void dfs1(int u, int p) {
	tin[u]=low[u]=dt++;
	st[sth++]=u;
	++n2;
	for(int v : adj1[u]) {
		if(!tin[v]) {
			dfs1(v, u);
			low[u]=min(low[v], low[u]);
			if(low[v]>=tin[u]) {
				adj2[u].push_back(bccI+n);
				while(st[sth-1]!=u)
					adj2[bccI+n].push_back(st[--sth]);
				++bccI;
			}
		} else if(v!=p)
			low[u]=min(tin[v], low[u]);
	}
}

void dfs2(int u, int p) {
//	cout << "d21 " << u << " " << p << endl;
	sz[u]=u<n;
	for(int v : adj2[u]) {
		dfs2(v, u);
		sz[u]+=sz[v];
		if(u>=n)
			ans-=(adj2[u].size()-(p==-1))*sz[v]*(sz[v]-1);
	}
	if(u>=n)
		ans-=adj2[u].size()*(n2-sz[u])*(n2-sz[u]-1);
//	cout << "d29 " << u << " " << p << endl;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> m;
	while(m--) {
		int u, v;
		cin >> u >> v, --u, --v;
		adj1[u].push_back(v);
		adj1[v].push_back(u);
	}
	for(int i=0; i<n; ++i) {
		if(tin[i])
			continue;
		dfs1(i, -1);
		ans+=n2*(n2-1)*(n2-2);
		dfs2(i, -1);
		n2=0;
	}
	cout << ans;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7416 KB Output is correct
2 Correct 8 ms 7524 KB Output is correct
3 Correct 8 ms 7524 KB Output is correct
4 Correct 8 ms 7524 KB Output is correct
5 Correct 7 ms 7532 KB Output is correct
6 Correct 10 ms 7552 KB Output is correct
7 Incorrect 8 ms 7552 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7416 KB Output is correct
2 Correct 8 ms 7524 KB Output is correct
3 Correct 8 ms 7524 KB Output is correct
4 Correct 8 ms 7524 KB Output is correct
5 Correct 7 ms 7532 KB Output is correct
6 Correct 10 ms 7552 KB Output is correct
7 Incorrect 8 ms 7552 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 22516 KB Output is correct
2 Correct 145 ms 22656 KB Output is correct
3 Correct 155 ms 22836 KB Output is correct
4 Correct 130 ms 22836 KB Output is correct
5 Correct 143 ms 22836 KB Output is correct
6 Correct 161 ms 22836 KB Output is correct
7 Correct 126 ms 22836 KB Output is correct
8 Correct 116 ms 22836 KB Output is correct
9 Correct 104 ms 22836 KB Output is correct
10 Correct 169 ms 22836 KB Output is correct
11 Correct 99 ms 22836 KB Output is correct
12 Correct 121 ms 22836 KB Output is correct
13 Correct 107 ms 22836 KB Output is correct
14 Correct 100 ms 22836 KB Output is correct
15 Correct 77 ms 22836 KB Output is correct
16 Correct 94 ms 22836 KB Output is correct
17 Correct 10 ms 22836 KB Output is correct
18 Correct 12 ms 22836 KB Output is correct
19 Correct 11 ms 22836 KB Output is correct
20 Correct 11 ms 22836 KB Output is correct
21 Correct 11 ms 22836 KB Output is correct
22 Correct 13 ms 22836 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 22836 KB Output is correct
2 Correct 9 ms 22836 KB Output is correct
3 Correct 9 ms 22836 KB Output is correct
4 Correct 9 ms 22836 KB Output is correct
5 Correct 11 ms 22836 KB Output is correct
6 Correct 8 ms 22836 KB Output is correct
7 Correct 10 ms 22836 KB Output is correct
8 Correct 8 ms 22836 KB Output is correct
9 Correct 8 ms 22836 KB Output is correct
10 Correct 8 ms 22836 KB Output is correct
11 Correct 10 ms 22836 KB Output is correct
12 Correct 8 ms 22836 KB Output is correct
13 Correct 8 ms 22836 KB Output is correct
14 Correct 12 ms 22836 KB Output is correct
15 Correct 8 ms 22836 KB Output is correct
16 Correct 7 ms 22836 KB Output is correct
17 Correct 9 ms 22836 KB Output is correct
18 Correct 9 ms 22836 KB Output is correct
19 Correct 9 ms 22836 KB Output is correct
20 Correct 9 ms 22836 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 22836 KB Output is correct
2 Correct 155 ms 22836 KB Output is correct
3 Correct 136 ms 22836 KB Output is correct
4 Correct 149 ms 22836 KB Output is correct
5 Correct 128 ms 22836 KB Output is correct
6 Correct 219 ms 28080 KB Output is correct
7 Correct 150 ms 28080 KB Output is correct
8 Correct 173 ms 28080 KB Output is correct
9 Correct 160 ms 28080 KB Output is correct
10 Correct 169 ms 28080 KB Output is correct
11 Correct 152 ms 28080 KB Output is correct
12 Correct 144 ms 28080 KB Output is correct
13 Correct 151 ms 28080 KB Output is correct
14 Correct 112 ms 28080 KB Output is correct
15 Correct 117 ms 28080 KB Output is correct
16 Correct 61 ms 28080 KB Output is correct
17 Correct 76 ms 28080 KB Output is correct
18 Correct 88 ms 28080 KB Output is correct
19 Correct 91 ms 28080 KB Output is correct
20 Correct 95 ms 28080 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 28080 KB Output is correct
2 Correct 8 ms 28080 KB Output is correct
3 Incorrect 8 ms 28080 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 127 ms 28080 KB Output is correct
2 Correct 177 ms 28080 KB Output is correct
3 Incorrect 135 ms 28080 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7416 KB Output is correct
2 Correct 8 ms 7524 KB Output is correct
3 Correct 8 ms 7524 KB Output is correct
4 Correct 8 ms 7524 KB Output is correct
5 Correct 7 ms 7532 KB Output is correct
6 Correct 10 ms 7552 KB Output is correct
7 Incorrect 8 ms 7552 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7416 KB Output is correct
2 Correct 8 ms 7524 KB Output is correct
3 Correct 8 ms 7524 KB Output is correct
4 Correct 8 ms 7524 KB Output is correct
5 Correct 7 ms 7532 KB Output is correct
6 Correct 10 ms 7552 KB Output is correct
7 Incorrect 8 ms 7552 KB Output isn't correct
8 Halted 0 ms 0 KB -