oj.uz

Submission #422729

# Submission time Handle Problem Language Result Execution time Memory
422729 2021-06-10T11:18:59 Z amunduzbaev Making Friends on Joitter is Fun (JOI20_joitter2) C++14
17 / 100
 5000 ms 82596 KB 
/* made by amunduzbaev */
 
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
 
using namespace std;
//~ using namespace __gnu_pbds;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update> ordered_set;
 
const int N = 2e5+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, s, t, q, ans, res, a[N];
int par[N], sz[N];
set<int> in[N], tocomp[N], fromcomp[N];
queue<pii> qq;

void add(int a, int b){
	tocomp[a].insert(b), fromcomp[b].insert(a);
	if(tocomp[b].count(a) && fromcomp[a].count(b)) qq.push({a, b});
}

int f(int x) { return (x == par[x] ? x : par[x] = f(par[x])); }
void merge(int a, int b){
	a = f(a), b = f(b);
	if(a == b) return;
	if(sz(in[a]) + sz(tocomp[a]) + sz(fromcomp[a]) > sz(in[b]) + sz(tocomp[b]) + sz(fromcomp[b])) swap(a, b);
	res += (sz(in[a]) * sz[b] + sz(in[b]) * sz[a]);
	par[b] = a, sz[a] += sz[b];
	for(auto x : in[b]){
		if(in[a].count(x)) res -= sz[a];
		else in[a].insert(x);
	}
	
	tocomp[a].erase(b), fromcomp[a].erase(b);
	tocomp[b].erase(a), fromcomp[b].erase(a);
	for(auto x : tocomp[b]){
		fromcomp[x].erase(b);
		add(a, x);
	}
	for(auto x : fromcomp[b]){
		tocomp[x].erase(b);
		add(x, a);
	}
	
	tocomp[b].clear(), fromcomp[b].clear(), in[b].clear();
}

void solve(int t_case){
	cin>>n>>m;
	for(int i=1;i<=n;i++) in[i].insert(i), par[i] = i, sz[i] = 1;
	while(m--){
		int a, b; cin>>a>>b;
		if(f(a) == f(b) || in[f(b)].count(a)){
			cout<<res<<"\n";
			continue;
		} in[f(b)].insert(a);
		res += sz[f(b)];
		add(f(a), f(b));
		
		while(!qq.empty()){
			int a = qq.front().ff, b = qq.front().ss; qq.pop();
			merge(a, b);
		} cout<<res<<"\n";
	}
}

signed main(){
	NeedForSpeed
	if(MULTI){
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} else solve(1);
	return 0;
}

Compilation message

joitter2.cpp: In function 'void usaco(std::string)':
joitter2.cpp:32:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joitter2.cpp:33:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |  freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 20 ms 28504 KB Output is correct
3 Correct 19 ms 28492 KB Output is correct
4 Correct 18 ms 28492 KB Output is correct
5 Correct 18 ms 28448 KB Output is correct
6 Correct 22 ms 28488 KB Output is correct
7 Correct 19 ms 28540 KB Output is correct
8 Correct 22 ms 28548 KB Output is correct
9 Correct 19 ms 28488 KB Output is correct
10 Correct 18 ms 28504 KB Output is correct
11 Correct 19 ms 28492 KB Output is correct
12 Correct 19 ms 28504 KB Output is correct
13 Correct 18 ms 28492 KB Output is correct
14 Correct 19 ms 28500 KB Output is correct
15 Correct 19 ms 28476 KB Output is correct
16 Correct 20 ms 28492 KB Output is correct
17 Correct 19 ms 28492 KB Output is correct
18 Correct 20 ms 28512 KB Output is correct
19 Correct 18 ms 28404 KB Output is correct
20 Correct 19 ms 28492 KB Output is correct
21 Correct 21 ms 28448 KB Output is correct
22 Correct 19 ms 28492 KB Output is correct
23 Correct 19 ms 28508 KB Output is correct
24 Correct 20 ms 28512 KB Output is correct
25 Correct 19 ms 28492 KB Output is correct
26 Correct 19 ms 28492 KB Output is correct
27 Correct 19 ms 28484 KB Output is correct
28 Correct 19 ms 28492 KB Output is correct
29 Correct 18 ms 28492 KB Output is correct
30 Correct 18 ms 28500 KB Output is correct
31 Correct 18 ms 28492 KB Output is correct
32 Correct 18 ms 28492 KB Output is correct
33 Correct 19 ms 28508 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 20 ms 28504 KB Output is correct
3 Correct 19 ms 28492 KB Output is correct
4 Correct 18 ms 28492 KB Output is correct
5 Correct 18 ms 28448 KB Output is correct
6 Correct 22 ms 28488 KB Output is correct
7 Correct 19 ms 28540 KB Output is correct
8 Correct 22 ms 28548 KB Output is correct
9 Correct 19 ms 28488 KB Output is correct
10 Correct 18 ms 28504 KB Output is correct
11 Correct 19 ms 28492 KB Output is correct
12 Correct 19 ms 28504 KB Output is correct
13 Correct 18 ms 28492 KB Output is correct
14 Correct 19 ms 28500 KB Output is correct
15 Correct 19 ms 28476 KB Output is correct
16 Correct 20 ms 28492 KB Output is correct
17 Correct 19 ms 28492 KB Output is correct
18 Correct 20 ms 28512 KB Output is correct
19 Correct 18 ms 28404 KB Output is correct
20 Correct 19 ms 28492 KB Output is correct
21 Correct 21 ms 28448 KB Output is correct
22 Correct 19 ms 28492 KB Output is correct
23 Correct 19 ms 28508 KB Output is correct
24 Correct 20 ms 28512 KB Output is correct
25 Correct 19 ms 28492 KB Output is correct
26 Correct 19 ms 28492 KB Output is correct
27 Correct 19 ms 28484 KB Output is correct
28 Correct 19 ms 28492 KB Output is correct
29 Correct 18 ms 28492 KB Output is correct
30 Correct 18 ms 28500 KB Output is correct
31 Correct 18 ms 28492 KB Output is correct
32 Correct 18 ms 28492 KB Output is correct
33 Correct 19 ms 28508 KB Output is correct
34 Correct 24 ms 28620 KB Output is correct
35 Correct 575 ms 37996 KB Output is correct
36 Correct 2148 ms 50936 KB Output is correct
37 Correct 2198 ms 52472 KB Output is correct
38 Correct 2218 ms 49356 KB Output is correct
39 Correct 310 ms 28752 KB Output is correct
40 Correct 25 ms 28788 KB Output is correct
41 Correct 26 ms 28828 KB Output is correct
42 Correct 306 ms 28756 KB Output is correct
43 Correct 682 ms 28868 KB Output is correct
44 Correct 678 ms 28916 KB Output is correct
45 Correct 300 ms 28748 KB Output is correct
46 Correct 305 ms 28844 KB Output is correct
47 Correct 82 ms 28824 KB Output is correct
48 Correct 94 ms 28828 KB Output is correct
49 Correct 534 ms 31432 KB Output is correct
50 Correct 2128 ms 51972 KB Output is correct
51 Correct 753 ms 29252 KB Output is correct
52 Correct 1908 ms 46360 KB Output is correct
53 Correct 617 ms 30968 KB Output is correct
54 Correct 2020 ms 49108 KB Output is correct
55 Correct 864 ms 30144 KB Output is correct
56 Correct 845 ms 30092 KB Output is correct
57 Correct 686 ms 29260 KB Output is correct
58 Correct 689 ms 29260 KB Output is correct
59 Correct 23 ms 28612 KB Output is correct
60 Correct 107 ms 33628 KB Output is correct
61 Correct 211 ms 28868 KB Output is correct
62 Correct 2055 ms 52156 KB Output is correct

Subtask #3
0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 20 ms 28504 KB Output is correct
3 Correct 19 ms 28492 KB Output is correct
4 Correct 18 ms 28492 KB Output is correct
5 Correct 18 ms 28448 KB Output is correct
6 Correct 22 ms 28488 KB Output is correct
7 Correct 19 ms 28540 KB Output is correct
8 Correct 22 ms 28548 KB Output is correct
9 Correct 19 ms 28488 KB Output is correct
10 Correct 18 ms 28504 KB Output is correct
11 Correct 19 ms 28492 KB Output is correct
12 Correct 19 ms 28504 KB Output is correct
13 Correct 18 ms 28492 KB Output is correct
14 Correct 19 ms 28500 KB Output is correct
15 Correct 19 ms 28476 KB Output is correct
16 Correct 20 ms 28492 KB Output is correct
17 Correct 19 ms 28492 KB Output is correct
18 Correct 20 ms 28512 KB Output is correct
19 Correct 18 ms 28404 KB Output is correct
20 Correct 19 ms 28492 KB Output is correct
21 Correct 21 ms 28448 KB Output is correct
22 Correct 19 ms 28492 KB Output is correct
23 Correct 19 ms 28508 KB Output is correct
24 Correct 20 ms 28512 KB Output is correct
25 Correct 19 ms 28492 KB Output is correct
26 Correct 19 ms 28492 KB Output is correct
27 Correct 19 ms 28484 KB Output is correct
28 Correct 19 ms 28492 KB Output is correct
29 Correct 18 ms 28492 KB Output is correct
30 Correct 18 ms 28500 KB Output is correct
31 Correct 18 ms 28492 KB Output is correct
32 Correct 18 ms 28492 KB Output is correct
33 Correct 19 ms 28508 KB Output is correct
34 Correct 24 ms 28620 KB Output is correct
35 Correct 575 ms 37996 KB Output is correct
36 Correct 2148 ms 50936 KB Output is correct
37 Correct 2198 ms 52472 KB Output is correct
38 Correct 2218 ms 49356 KB Output is correct
39 Correct 310 ms 28752 KB Output is correct
40 Correct 25 ms 28788 KB Output is correct
41 Correct 26 ms 28828 KB Output is correct
42 Correct 306 ms 28756 KB Output is correct
43 Correct 682 ms 28868 KB Output is correct
44 Correct 678 ms 28916 KB Output is correct
45 Correct 300 ms 28748 KB Output is correct
46 Correct 305 ms 28844 KB Output is correct
47 Correct 82 ms 28824 KB Output is correct
48 Correct 94 ms 28828 KB Output is correct
49 Correct 534 ms 31432 KB Output is correct
50 Correct 2128 ms 51972 KB Output is correct
51 Correct 753 ms 29252 KB Output is correct
52 Correct 1908 ms 46360 KB Output is correct
53 Correct 617 ms 30968 KB Output is correct
54 Correct 2020 ms 49108 KB Output is correct
55 Correct 864 ms 30144 KB Output is correct
56 Correct 845 ms 30092 KB Output is correct
57 Correct 686 ms 29260 KB Output is correct
58 Correct 689 ms 29260 KB Output is correct
59 Correct 23 ms 28612 KB Output is correct
60 Correct 107 ms 33628 KB Output is correct
61 Correct 211 ms 28868 KB Output is correct
62 Correct 2055 ms 52156 KB Output is correct
63 Correct 661 ms 82496 KB Output is correct
64 Correct 661 ms 82596 KB Output is correct
65 Correct 689 ms 82412 KB Output is correct
66 Execution timed out 5083 ms 35720 KB Time limit exceeded
67 Halted 0 ms 0 KB -