oj.uz

Submission #392584

# Submission time Handle Problem Language Result Execution time Memory
392584 2021-04-21T10:49:28 Z patrikpavic2 Marriage questions (IZhO14_marriage) C++17
96 / 100
 1500 ms 7396 KB 
#include <cstdio>
#include <cstring>
#include <vector>
 
#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;
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 y : v[x]){
		if(un[y] && (par[y] == -1 || dodaj(par[y]))){
			par[x] = y; par[y] = 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);
	}
	memset(par, -1, sizeof(par));
	for(int i = 0;i < m;i++){
		un[i + n] = 1;
		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;
			if(par[l - 1] != -1){
				sol--; par[par[l - 1]] = -1;
				sol += dodaj(par[l - 1]); cookie++;
				if(par[par[l - 1]] != -1){
					for(int x : v[par[l - 1]]) m1[x].PB(par[l - 1]);
				}
			}	
		}		
		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:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |  scanf("%d%d%d", &n, &m, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
marriage.cpp:39:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |   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 2 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 1952 KB Output is correct
6 Correct 1 ms 1956 KB Output is correct
7 Correct 1 ms 1872 KB Output is correct
8 Correct 1 ms 1868 KB Output is correct
9 Correct 1 ms 1868 KB Output is correct
10 Correct 1 ms 1868 KB Output is correct
11 Correct 1 ms 1868 KB Output is correct
12 Correct 1 ms 1868 KB Output is correct
13 Correct 2 ms 1868 KB Output is correct
14 Correct 1 ms 1952 KB Output is correct
15 Correct 1 ms 1868 KB Output is correct
16 Correct 1 ms 1940 KB Output is correct
17 Correct 1 ms 1868 KB Output is correct
18 Correct 1 ms 1868 KB Output is correct
19 Correct 4 ms 1968 KB Output is correct
20 Correct 2 ms 1868 KB Output is correct
21 Correct 2 ms 1868 KB Output is correct
22 Correct 1 ms 1952 KB Output is correct
23 Correct 2 ms 1868 KB Output is correct
24 Correct 2 ms 1868 KB Output is correct
25 Correct 34 ms 2256 KB Output is correct
26 Correct 6 ms 1996 KB Output is correct
27 Correct 2 ms 1868 KB Output is correct
28 Correct 2 ms 1952 KB Output is correct
29 Correct 8 ms 2124 KB Output is correct
30 Correct 7 ms 2196 KB Output is correct
31 Correct 254 ms 3052 KB Output is correct
32 Correct 17 ms 2164 KB Output is correct
33 Correct 2 ms 1996 KB Output is correct
34 Correct 2 ms 1996 KB Output is correct
35 Correct 134 ms 3788 KB Output is correct
36 Correct 95 ms 3652 KB Output is correct
37 Correct 776 ms 3260 KB Output is correct
38 Correct 162 ms 4476 KB Output is correct
39 Correct 3 ms 2252 KB Output is correct
40 Correct 7 ms 2636 KB Output is correct
41 Correct 69 ms 3060 KB Output is correct
42 Correct 189 ms 3348 KB Output is correct
43 Correct 240 ms 3592 KB Output is correct
44 Correct 655 ms 4608 KB Output is correct
45 Correct 23 ms 3908 KB Output is correct
46 Execution timed out 1576 ms 6428 KB Time limit exceeded
47 Correct 1094 ms 5340 KB Output is correct
48 Correct 1059 ms 5312 KB Output is correct
49 Execution timed out 1589 ms 7396 KB Time limit exceeded
50 Correct 4 ms 2508 KB Output is correct