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답안 #341604

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
341604 2020-12-30T07:58:58 Z amunduzbaev 결혼 문제 (IZhO14_marriage) C++14
100 / 100
 852 ms 25708 KB 
/** made by amunduzbaev **/
 
#include <bits/stdc++.h>
using namespace std;
 
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ll long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vll vector<ll>
#define vii vector<int>
#define vpii vector<pii>
#define vpll vector<pll>
#define cnt(a)__builtin_popcount(a)
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;}
 
const int N = 1e6+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);

int n, m, k, ans, match[N], used[N], ver, l, r;

vector<vii> edges(N);

bool kun(int cur){
	if(used[cur] == ver) return 0;
	used[cur] = ver;
	for(auto x:edges[cur]){
		if(x <= r && x >= l && (match[x] == -1 || kun(match[x]))) { match[x] = cur; return 1; }
	}return 0;
}

void solve(){
	cin>>n>>m>>k;
	for(int i=0;i<k;i++){
		int a, b;
		cin>>a>>b;
		edges[--b].pb(--a);
	}
	
	for(int i=0;i<n;i++) match[i] = -1;
	
	vii need;
	for(int i=0;i<m;i++){
		int cur = i;
		ver++;
		while(r < n && !kun(cur)) r++, ver++;
		if(r == n) {
			cout<<0<<endl;
			return;
		}
		//for(int i=0;i<n;i++) cout<<match[i]<<" ";
		//cout<<"\n";
	}
	
	bool ok = 1;
	for(l=0;l<n && ok;l++){
		while(!need.empty()){
			int cur = need.back();
			ver++;
			while(r < n && !kun(cur)) r++, ver++;
			if(r == n) { ok = 0; break; }
			need.pop_back();
		}
		if(!ok) break;
		//cout<<l<<" "<<r<<"\n";
		ans += (n-r);
		if(match[l] != -1){
			need.pb(match[l]);
			match[l] = -1;
		}
	}
	cout<<ans<<"\n";
	return;
}


main(){
	fastios
	int t = 0;
	if(!t) solve();
	else {
		cin>>t;
		while (t--) solve();
	}
}

Compilation message

marriage.cpp:90:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   90 | main(){
      |      ^

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23916 KB Output is correct
2 Correct 17 ms 23788 KB Output is correct
3 Correct 17 ms 23788 KB Output is correct
4 Correct 16 ms 23916 KB Output is correct
5 Correct 16 ms 23788 KB Output is correct
6 Correct 17 ms 23932 KB Output is correct
7 Correct 16 ms 23788 KB Output is correct
8 Correct 16 ms 23788 KB Output is correct
9 Correct 17 ms 23788 KB Output is correct
10 Correct 17 ms 23788 KB Output is correct
11 Correct 16 ms 23788 KB Output is correct
12 Correct 17 ms 23788 KB Output is correct
13 Correct 16 ms 23788 KB Output is correct
14 Correct 17 ms 23788 KB Output is correct
15 Correct 16 ms 23788 KB Output is correct
16 Correct 16 ms 23808 KB Output is correct
17 Correct 19 ms 23916 KB Output is correct
18 Correct 16 ms 23788 KB Output is correct
19 Correct 18 ms 23916 KB Output is correct
20 Correct 19 ms 23788 KB Output is correct
21 Correct 16 ms 23788 KB Output is correct
22 Correct 17 ms 23788 KB Output is correct
23 Correct 17 ms 23788 KB Output is correct
24 Correct 17 ms 23788 KB Output is correct
25 Correct 52 ms 24172 KB Output is correct
26 Correct 20 ms 23916 KB Output is correct
27 Correct 17 ms 23936 KB Output is correct
28 Correct 17 ms 23788 KB Output is correct
29 Correct 18 ms 24044 KB Output is correct
30 Correct 18 ms 23916 KB Output is correct
31 Correct 299 ms 24684 KB Output is correct
32 Correct 18 ms 23916 KB Output is correct
33 Correct 16 ms 23788 KB Output is correct
34 Correct 24 ms 23916 KB Output is correct
35 Correct 140 ms 25068 KB Output is correct
36 Correct 107 ms 24940 KB Output is correct
37 Correct 852 ms 24556 KB Output is correct
38 Correct 35 ms 25196 KB Output is correct
39 Correct 126 ms 24172 KB Output is correct
40 Correct 21 ms 24320 KB Output is correct
41 Correct 26 ms 24300 KB Output is correct
42 Correct 22 ms 24300 KB Output is correct
43 Correct 26 ms 24556 KB Output is correct
44 Correct 33 ms 25324 KB Output is correct
45 Correct 24 ms 24428 KB Output is correct
46 Correct 44 ms 25452 KB Output is correct
47 Correct 41 ms 25452 KB Output is correct
48 Correct 36 ms 25324 KB Output is correct
49 Correct 43 ms 25708 KB Output is correct
50 Correct 263 ms 24172 KB Output is correct