oj.uz

Submission #392597

# Submission time Handle Problem Language Result Execution time Memory
392597 2021-04-21T10:57:30 Z patrikpavic2 Marriage questions (IZhO14_marriage) C++17
96 / 100
 1500 ms 5220 KB 
#include <cstdio>
#include <cstring>
#include <vector>
#include <algorithm>
 
#define PB push_back
 
using namespace std;
 
typedef long long ll;
 
const int N = (1 << 15);
 
int par[N], n, m, bio[N], k, un[N], cookie = 1;
int poc[N], deg[N];
vector < int > v[N], m1[N];
 
bool dodaj(int x){
	if(bio[x] == cookie) return 0;
	bio[x] = cookie;
	while((int)m1[x].size() > 0 && (!un[m1[x].back()] || par[m1[x].back()] != -1)) 
		m1[x].pop_back();
	if((int)m1[x].size() > 0){
		int y = m1[x].back(); 
		par[x] = y; par[y] = x;
		m1[x].pop_back();
		return 1;
	}
	for(int i = poc[x];i < deg[x] && un[v[x][i]];i++){
		if(par[v[x][i]] == -1) {
			printf("wtf..");
			exit(0);
		}
		if(dodaj(par[v[x][i]])){
			par[x] = v[x][i]; par[v[x][i]] = x;
			return 1;
		}
	}
	return 0;
}
 
int main(){
	scanf("%d%d%d", &n, &m, &k);
	for(int i = 0;i < k;i++){
		int a, b; scanf("%d%d", &a, &b);
		a--; b--;
		v[a].PB(n + b), v[b + n].PB(a);
		deg[a]++; deg[n + b]++;
	}
	memset(par, -1, sizeof(par));
	for(int i = 0;i < m;i++){
		un[i + n] = 1;
		sort(v[i + n].begin(), v[i + n].end());
		for(int x : v[i + n]) m1[x].PB(i + n);
	}
	int r = 0, sol = 0;
	ll ans = 0;
	for(int l = 0;l < n;l++){
		if(l && sol == m){
			un[l - 1] = 0;
			for(int i = n;i < m + n;i++)
				if(poc[i] < deg[i] && v[i][poc[i]] < l) poc[i]++;
			if(par[l - 1] != -1){
				sol--; par[par[l - 1]] = -1;
				sol += dodaj(par[l - 1]); cookie++;
				if(par[par[l - 1]] == -1){
					int cnt = 0;
					for(int x : v[par[l - 1]]) {
						if(x < l) continue;
						cnt++;
						m1[x].PB(par[l - 1]);
						if(cnt > m) break;
					}
				}
			}	
		}		
		while(r < n && sol < m){
			un[r] = 1; sol += dodaj(r); cookie++;
			if(par[r] == -1){
				for(int x : v[r]) m1[x].PB(r);
			}
			r++;
		}
		ans += (n + 1 - r) * (sol == m);
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message

marriage.cpp: In function 'int main()':
marriage.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |  scanf("%d%d%d", &n, &m, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:45:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |   int a, b; scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
96.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1868 KB Output is correct
2 Correct 1 ms 1868 KB Output is correct
3 Correct 1 ms 1868 KB Output is correct
4 Correct 1 ms 1868 KB Output is correct
5 Correct 1 ms 1868 KB Output is correct
6 Correct 1 ms 1868 KB Output is correct
7 Correct 1 ms 1868 KB Output is correct
8 Correct 1 ms 1868 KB Output is correct
9 Correct 1 ms 1868 KB Output is correct
10 Correct 2 ms 1868 KB Output is correct
11 Correct 2 ms 1868 KB Output is correct
12 Correct 1 ms 1868 KB Output is correct
13 Correct 1 ms 1868 KB Output is correct
14 Correct 1 ms 1868 KB Output is correct
15 Correct 1 ms 1868 KB Output is correct
16 Correct 1 ms 1868 KB Output is correct
17 Correct 1 ms 1868 KB Output is correct
18 Correct 1 ms 1868 KB Output is correct
19 Correct 3 ms 1996 KB Output is correct
20 Correct 2 ms 1868 KB Output is correct
21 Correct 1 ms 1872 KB Output is correct
22 Correct 1 ms 1868 KB Output is correct
23 Correct 2 ms 1868 KB Output is correct
24 Correct 2 ms 1868 KB Output is correct
25 Correct 13 ms 2252 KB Output is correct
26 Correct 5 ms 2124 KB Output is correct
27 Correct 2 ms 1868 KB Output is correct
28 Correct 2 ms 1868 KB Output is correct
29 Correct 10 ms 2124 KB Output is correct
30 Correct 7 ms 2124 KB Output is correct
31 Correct 107 ms 2900 KB Output is correct
32 Correct 19 ms 2124 KB Output is correct
33 Correct 2 ms 1996 KB Output is correct
34 Correct 2 ms 1996 KB Output is correct
35 Correct 139 ms 3744 KB Output is correct
36 Correct 100 ms 3552 KB Output is correct
37 Correct 292 ms 3140 KB Output is correct
38 Correct 190 ms 4384 KB Output is correct
39 Correct 17 ms 2300 KB Output is correct
40 Correct 8 ms 2616 KB Output is correct
41 Correct 92 ms 3024 KB Output is correct
42 Correct 225 ms 3232 KB Output is correct
43 Correct 277 ms 3500 KB Output is correct
44 Correct 737 ms 4380 KB Output is correct
45 Correct 89 ms 3908 KB Output is correct
46 Execution timed out 1583 ms 5172 KB Time limit exceeded
47 Correct 1228 ms 5220 KB Output is correct
48 Correct 1200 ms 5204 KB Output is correct
49 Execution timed out 1599 ms 5164 KB Time limit exceeded
50 Correct 52 ms 2372 KB Output is correct