oj.uz

Submission #254858

# Submission time Handle Problem Language Result Execution time Memory
254858 2020-07-30T18:22:10 Z Lawliet Bridges (APIO19_bridges) C++17
13 / 100
 3000 ms 4348 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 50010;
const int MAXM = 100010;

int n, m, q;

int anc[MAXN], sz[MAXN];
int U[MAXM], V[MAXM], W[MAXM];

int find(int cur)
{
	if( anc[cur] == cur ) return cur;
	return anc[cur] = find( anc[cur] );
}

void join(int i, int j)
{
	i = find(i); j = find(j);

	if( i == j ) return;

	if( sz[i] < sz[j] )
		swap( i , j );

	anc[j] = i;
	sz[i] += sz[j];
}

void initDSU()
{
	for(int i = 1 ; i <= n ; i++)
		sz[i] = 1, anc[i] = i;
}

int main()
{
	scanf("%d %d",&n,&m);

	for(int i = 1 ; i <= m ; i++)
		scanf("%d %d %d",&U[i],&V[i],&W[i]);

	scanf("%d",&q);

	for(int i = 1 ; i <= q ; i++)
	{
		int type;
		scanf("%d",&type);

		if( type == 1 )
		{
			int ind, newW;
			scanf("%d %d",&ind,&newW);

			W[ind] = newW;
		}
		if( type == 2 )
		{
			int s, maxW;
			scanf("%d %d",&s,&maxW);

			initDSU();

			for(int j = 1 ; j <= m ; j++)
				if( W[j] >= maxW ) join( U[j] , V[j] );

			printf("%d\n",sz[ find(s) ]);
		}
	}
}

Compilation message

bridges.cpp: In function 'int main()':
bridges.cpp:40:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
bridges.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d",&U[i],&V[i],&W[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:45:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&q);
  ~~~~~^~~~~~~~~
bridges.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&type);
   ~~~~~^~~~~~~~~~~~
bridges.cpp:55:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d",&ind,&newW);
    ~~~~~^~~~~~~~~~~~~~~~~~~~
bridges.cpp:62:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d",&s,&maxW);
    ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 44 ms 512 KB Output is correct
4 Correct 6 ms 528 KB Output is correct
5 Correct 9 ms 512 KB Output is correct
6 Correct 7 ms 512 KB Output is correct
7 Correct 7 ms 384 KB Output is correct
8 Correct 9 ms 512 KB Output is correct
9 Correct 8 ms 384 KB Output is correct
10 Correct 9 ms 512 KB Output is correct
11 Correct 9 ms 512 KB Output is correct
12 Correct 10 ms 512 KB Output is correct
13 Correct 14 ms 512 KB Output is correct
14 Correct 12 ms 512 KB Output is correct
15 Correct 15 ms 512 KB Output is correct
16 Correct 8 ms 384 KB Output is correct
17 Correct 9 ms 384 KB Output is correct

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3063 ms 2948 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3070 ms 2676 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3069 ms 4348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3063 ms 2948 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 44 ms 512 KB Output is correct
4 Correct 6 ms 528 KB Output is correct
5 Correct 9 ms 512 KB Output is correct
6 Correct 7 ms 512 KB Output is correct
7 Correct 7 ms 384 KB Output is correct
8 Correct 9 ms 512 KB Output is correct
9 Correct 8 ms 384 KB Output is correct
10 Correct 9 ms 512 KB Output is correct
11 Correct 9 ms 512 KB Output is correct
12 Correct 10 ms 512 KB Output is correct
13 Correct 14 ms 512 KB Output is correct
14 Correct 12 ms 512 KB Output is correct
15 Correct 15 ms 512 KB Output is correct
16 Correct 8 ms 384 KB Output is correct
17 Correct 9 ms 384 KB Output is correct
18 Execution timed out 3063 ms 2948 KB Time limit exceeded
19 Halted 0 ms 0 KB -