oj.uz

Submission #259132

# Submission time Handle Problem Language Result Execution time Memory
259132 2020-08-07T08:37:36 Z _7_7_ Duathlon (APIO18_duathlon) C++14
8 / 100
 78 ms 11868 KB 
#include <bits/stdc++.h>                                           
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define int long long
//#pragma GCC optimize("Ofast")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
 
 
#define file(s) freopen(s".in","r",stdin); freopen(s".out","w",stdout);
#define fastio ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define all(x) x.begin(), x.end()
#define sz(s) (int)s.size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define s second
#define f first
 
 
 
 
typedef pair < long long, long long > pll;    
typedef pair < int, int > pii;  
typedef unsigned long long ull;         
typedef vector < pii > vpii;                                   	
typedef vector < int > vi;
typedef long double ldb;  
typedef long long ll;  
typedef double db;
 
typedef tree < int, null_type, less < int >, rb_tree_tag, tree_order_statistics_node_update > ordered_set;
 
const int inf = 1e9, maxn = 2e5 + 48, mod = 998244353, N = 1e5 + 12;
const int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1}, block = 300;
const pii base = mp(1171, 3307), Mod = mp(1e9 + 7, 1e9 + 9);
const db eps = 1e-12, pi = acos(-1);
const ll INF = 1e18;
 
 
int n, m, v, u, cnt;
bool cycle, was[N];
vi g[N];
ll ans;
 
void dfs (int v, int p = 0) {
	was[v] = 1;
	++cnt;
 
	for (auto to : g[v])
		if (to != p) {
			if (was[to])
				cycle = 1;
			else
				dfs(to, v);
		}
}
 
 
main () {
	fastio
	cin >> n >> m;
	while (m--) {
		cin >> v >> u;
		g[v].pb(u);
		g[u].pb(v);
	}
 
	for (int i = 1; i <= n; ++i)	
		if (!was[i]) {
		    cnt = 0, cycle = 0;
			dfs(i); 
			if (!cycle)
				ans += cnt * 1ll * (cnt - 1) * (cnt - 2) / 3;
			else
				ans += cnt * 1ll * (cnt - 1) * (cnt - 2);
		}
 
	cout << ans << endl;
}

Compilation message

count_triplets.cpp:64:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Correct 2 ms 2688 KB Output is correct
4 Correct 2 ms 2688 KB Output is correct
5 Correct 2 ms 2688 KB Output is correct
6 Correct 2 ms 2688 KB Output is correct
7 Incorrect 2 ms 2688 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Correct 2 ms 2688 KB Output is correct
4 Correct 2 ms 2688 KB Output is correct
5 Correct 2 ms 2688 KB Output is correct
6 Correct 2 ms 2688 KB Output is correct
7 Incorrect 2 ms 2688 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 64 ms 10648 KB Output is correct
2 Correct 67 ms 11868 KB Output is correct
3 Correct 55 ms 9464 KB Output is correct
4 Correct 64 ms 10744 KB Output is correct
5 Correct 60 ms 8696 KB Output is correct
6 Correct 78 ms 8788 KB Output is correct
7 Correct 56 ms 8056 KB Output is correct
8 Correct 58 ms 8440 KB Output is correct
9 Correct 57 ms 7672 KB Output is correct
10 Correct 74 ms 8056 KB Output is correct
11 Correct 49 ms 6904 KB Output is correct
12 Correct 45 ms 6776 KB Output is correct
13 Correct 38 ms 6776 KB Output is correct
14 Correct 38 ms 6648 KB Output is correct
15 Correct 31 ms 6144 KB Output is correct
16 Correct 30 ms 6016 KB Output is correct
17 Correct 3 ms 2816 KB Output is correct
18 Correct 3 ms 2816 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2816 KB Output is correct
21 Correct 2 ms 2816 KB Output is correct
22 Correct 4 ms 2816 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 65 ms 6684 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 6520 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Correct 2 ms 2688 KB Output is correct
4 Correct 2 ms 2688 KB Output is correct
5 Correct 2 ms 2688 KB Output is correct
6 Correct 2 ms 2688 KB Output is correct
7 Incorrect 2 ms 2688 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB Output is correct
2 Correct 2 ms 2688 KB Output is correct
3 Correct 2 ms 2688 KB Output is correct
4 Correct 2 ms 2688 KB Output is correct
5 Correct 2 ms 2688 KB Output is correct
6 Correct 2 ms 2688 KB Output is correct
7 Incorrect 2 ms 2688 KB Output isn't correct
8 Halted 0 ms 0 KB -