oj.uz

Submission #1021733

# Submission time Handle Problem Language Result Execution time Memory
1021733 2024-07-13T04:01:19 Z ByeWorld Duathlon (APIO18_duathlon) C++14
23 / 100
 95 ms 27704 KB 
#include <bits/stdc++.h>
// #pragma GCC optimize("O3", "unroll-loops")
#define ll long long
#define int long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 1e5+10;
const int MAXA = 9e3+20;
const ll INF = 1e18+10;
const int LOG = 20;
const int SQRT = 450;
const vector<int> NOL = {};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const vector<int> dx = {1, -1, 0, 0};
const vector<int> dy = {0, 0, 1, -1};
const int MOD = 1e9+7;
void chmx(int &a, int b){ a = max(a, b); }
int sum(int a, int b){ return (a+b)%MOD; }
int mul(int a, int b){ return (a*b)%MOD; }
void chsum(int &a, int b){ a = sum(a,b); }

int n, m;
int u[MAXN], v[MAXN];
vector <int> adj[MAXN];
int disc[MAXN], low[MAXN], tim;
int ap[MAXN], color, col[MAXN];
vector <int> edge[MAXN];
int sub[MAXN], val[MAXN];

void dfs(int nw, int par){
	disc[nw] = low[nw] = ++tim;
	for(auto nx : adj[nw]){
		if(nx==par) continue;
		if(disc[nx]!=0) low[nw] = min(low[nw], disc[nx]);
		else {
			dfs(nx, nw);
			low[nw] = min(low[nw], low[nx]);
		}
	}
	if(disc[nw]==low[nw] || (adj[nw].size()>=2 && nw==1)){
		ap[nw] = 1; col[nw] = ++color; val[col[nw]] = 1;
	}
}
void COL(int nw, int ty){
	col[nw] = ty; val[ty]++;
	for(auto nx : adj[nw]){
		if(ap[nx] || col[nx]) continue;
		COL(nx, ty);
	}
}

int ANS, root[MAXN];
void trav(int nw, int par, int roo){
	//S - C - F
	int te = 0, bef = 0; root[nw] = roo;
	sub[nw] = val[nw];
	for(auto nx : edge[nw]){
		if(nx==par) continue;
		trav(nx, nw, roo);
		sub[nw] += sub[nx];
		te += bef*sub[nx]*2;
		bef += sub[nx];
	}
	ANS += te*val[nw];
}
void bd(int nw, int par){
	for(auto nx : edge[nw]){
		if(nx==par) continue;
		bd(nx, nw);
	}
	int up = sub[root[nw]]-sub[nw], dw = sub[nw]-val[nw];
	int te = up*dw*2;
	// cout << nw << ' ' << te << " te\n";
	ANS += te*val[nw];
}
signed main(){
	// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> m;
	for(int i=1; i<=m; i++){
		cin >> u[i] >> v[i];
		adj[u[i]].pb(v[i]); adj[v[i]].pb(u[i]);
	}
	for(int i=1; i<=n; i++)
		if(!disc[i]) dfs(i, 0);
	for(int i=1; i<=n; i++){
		if(!col[i]) COL(i, ++color);
	}
	for(int i=1; i<=m; i++){
		int x = col[u[i]], y = col[v[i]];
		if(x==y) continue;
		edge[x].pb(y); edge[y].pb(x);
	}
	for(int i=1; i<=color; i++){
		sort(edge[i].begin(), edge[i].end());
		edge[i].resize(unique(edge[i].begin(), edge[i].end()) - edge[i].begin());
		// for(auto in : edge[i]) cout << in << ' ';
		// 	cout << i << "i\n";
	}
	for(int i=1; i<=n; i++)
		if(!sub[i]){ trav(i, 0, i); bd(i, 0); }
	// SCF
	for(int i=1; i<=color; i++){
		if(val[i]>=3) ANS += val[i]*(val[i]-1)*(val[i]-2);
	}
	// SC-F atau S-CF
	for(int i=1; i<=color; i++){
		if(val[i]>=2){
			int siz = sub[root[i]];
			ANS += val[i]*(val[i]-1)*(siz-val[i])*4;
			
			int oth = 0; // C - SF
			for(auto nx : edge[i]){
				if(val[nx]==1) oth++;
			}
			ANS += val[i]*(val[i]-1)*oth;
		}
	}
	// for(int i=1; i<=color; i++){
	// 	cout << i << ' ' << val[i] << " val\n";
	// }

	cout << ANS << '\n';
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 65 ms 21552 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 2 ms 5212 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 5212 KB Output is correct
5 Correct 3 ms 5208 KB Output is correct
6 Correct 3 ms 5212 KB Output is correct
7 Correct 3 ms 5212 KB Output is correct
8 Correct 3 ms 5212 KB Output is correct
9 Correct 3 ms 5212 KB Output is correct
10 Correct 2 ms 5212 KB Output is correct
11 Correct 3 ms 5212 KB Output is correct
12 Correct 3 ms 5212 KB Output is correct
13 Correct 3 ms 5208 KB Output is correct
14 Correct 3 ms 5208 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 2 ms 5252 KB Output is correct
17 Correct 3 ms 5212 KB Output is correct
18 Correct 2 ms 5212 KB Output is correct
19 Correct 3 ms 5212 KB Output is correct
20 Correct 4 ms 5112 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 19568 KB Output is correct
2 Correct 72 ms 19600 KB Output is correct
3 Correct 70 ms 19536 KB Output is correct
4 Correct 70 ms 19544 KB Output is correct
5 Correct 72 ms 19640 KB Output is correct
6 Correct 79 ms 27704 KB Output is correct
7 Correct 75 ms 22608 KB Output is correct
8 Correct 82 ms 21844 KB Output is correct
9 Correct 80 ms 20908 KB Output is correct
10 Correct 77 ms 19540 KB Output is correct
11 Correct 70 ms 19512 KB Output is correct
12 Correct 71 ms 19540 KB Output is correct
13 Correct 71 ms 19536 KB Output is correct
14 Correct 66 ms 18864 KB Output is correct
15 Correct 62 ms 18260 KB Output is correct
16 Correct 41 ms 16220 KB Output is correct
17 Correct 59 ms 19912 KB Output is correct
18 Correct 54 ms 19776 KB Output is correct
19 Correct 53 ms 20664 KB Output is correct
20 Correct 67 ms 19984 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5212 KB Output is correct
2 Correct 4 ms 5212 KB Output is correct
3 Incorrect 3 ms 5212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 19564 KB Output is correct
2 Correct 83 ms 19396 KB Output is correct
3 Incorrect 64 ms 16132 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4952 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4952 KB Output isn't correct
2 Halted 0 ms 0 KB -