oj.uz

Submission #136272

# Submission time Handle Problem Language Result Execution time Memory
136272 2019-07-25T05:20:36 Z 김세빈(#3258) Link (CEOI06_link) C++14
16 / 100
 597 ms 37136 KB 
#include <bits/stdc++.h>

using namespace std;

vector <int> V[505050];
int D[505050], P[505050];
int K[505050], S[505050];
int chk1[505050], chk2[505050];
int n, k, ans;

void dfs(int p, int v)
{
	for(int &t: V[p]){
		dfs(t, 0);
		K[p] = max(K[p], K[t] - 1);
	}
	
	if(!v && !K[p]){
		ans ++; K[p] = k;
	}
}

int main()
{
	int i, j, x, y;
	
	scanf("%d%d", &n, &k);
	
	for(i=1; i<=n; i++){
		scanf("%d%d", &x, &y);
		P[x] = y; D[y] ++;
	}
	
	K[1] = k + 1;
	
	for(i=2; i<=n; i++){
		if(!D[i]) ans ++, K[i] = k;
	}
	
	for(i=1; i<=n; i++){
		for(j=i; !chk1[j] && !chk2[j]; j=P[j]) chk1[j] = i;
		if(chk1[j] != i || chk2[j]) continue;
		for(; !chk2[j]; j=P[j]) chk2[j] = 1;
	}
	
	for(i=1; i<=n; i++){
		if(!chk2[i]){
			V[P[i]].push_back(i);
		}
	}
	
	for(i=1; i<=n; i++){
		if(chk2[i]) dfs(i, 1);
	}
	
	for(i=1; i<=n; i++){
		if(chk2[i]){
			for(j=i; chk2[j]; j=P[j]){
				K[P[j]] = max(K[P[j]], K[j] - 1);
				chk2[j] = 0;
			}
			
			for(j=i; chk1[j]; j=P[j]){
				K[P[j]] = max(K[P[j]], K[j] - 1);
				chk1[j] = 0;
			}
			
			x = 0; y = 0;
			
			for(j=i; !chk1[j]; j=P[j]){
				if(!K[j]) x ++;
				else y ++;
				if(K[j] && !K[P[j]]) S[P[j]] = 1;
				chk1[j] = 1;
			}
			
			if(x == 0) continue;
			else if(y == 0){
				ans += (x - 1) / k + 1;
				continue;
			}
			
			for(j=i; chk1[j]; j=P[j]){
				if(S[j] && !K[P[j]]) S[P[j]] = S[j] + 1;
				chk1[j] = 0;
			}
			
			for(j=i; !chk1[j]; j=P[j]){
				if(S[j] && !K[P[j]]) S[P[j]] = S[j] + 1;
				chk1[j] = 1;
			}
			
			for(j=i; chk1[j]; j=P[j]){
				if(!K[j] && K[P[j]]) ans += (S[j] - 1) / k + 1;
				chk1[j] = 0;
			}
		}
	}
	
	printf("%d\n", ans);
	
	return 0;
}

Compilation message

link.cpp: In function 'int main()':
link.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~
link.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &x, &y);
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
16.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Incorrect 13 ms 12280 KB Output isn't correct
3 Incorrect 13 ms 12280 KB Output isn't correct
4 Correct 16 ms 12280 KB Output is correct
5 Incorrect 14 ms 12408 KB Output isn't correct
6 Incorrect 26 ms 13412 KB Output isn't correct
7 Incorrect 37 ms 14456 KB Output isn't correct
8 Incorrect 47 ms 15484 KB Output isn't correct
9 Incorrect 69 ms 17584 KB Output isn't correct
10 Incorrect 68 ms 16980 KB Output isn't correct
11 Correct 84 ms 16760 KB Output is correct
12 Incorrect 151 ms 21368 KB Output isn't correct
13 Correct 192 ms 25020 KB Output is correct
14 Incorrect 277 ms 26744 KB Output isn't correct
15 Incorrect 335 ms 26352 KB Output isn't correct
16 Incorrect 368 ms 30968 KB Output isn't correct
17 Incorrect 429 ms 29676 KB Output isn't correct
18 Incorrect 488 ms 35448 KB Output isn't correct
19 Incorrect 522 ms 33912 KB Output isn't correct
20 Incorrect 597 ms 32916 KB Output isn't correct
21 Incorrect 559 ms 34424 KB Output isn't correct
22 Incorrect 443 ms 34320 KB Output isn't correct
23 Incorrect 486 ms 37136 KB Output isn't correct
24 Incorrect 500 ms 33356 KB Output isn't correct
25 Incorrect 437 ms 32540 KB Output isn't correct