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Submission #1021702

# Submission time Handle Problem Language Result Execution time Memory
1021702 2024-07-13T02:57:46 Z idiotcomputer Pipes (CEOI15_pipes) C++11
0 / 100
 674 ms 5528 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2")
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz size 
 
const int mxN = 1e5;
int n,m;

int p[2*mxN];

int gpar(const int &c){
	if (p[c] == c) return c;
	p[c] = gpar(p[c]);
	return p[c];
}

bool ss(const int &a, const int &b){
	return gpar(a) == gpar(b);
}

void un(const int &a, const int &b){
	p[gpar(a)] = gpar(b);
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
 
	cin >> n >> m;
	for (int i = 0; i < 2*n; i++) p[i] = i; 
	int a,b;
	int cnt = 0;
	for (int i = 0; i < m; i++){
		cin >> a >> b;
		a -= 1;
		b -= 1;
		if (!ss(a,b)) un(a,b);
		else if (!ss(a+n,b+n)) un(a+n,b+n);
		else continue;
		cnt++;
	}
	if (cnt > 2*n-2) while(true) continue;
	cout << cnt << '\n';
	return 0;	
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 348 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 55 ms 348 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 95 ms 348 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 191 ms 604 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 210 ms 860 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 366 ms 860 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 452 ms 1116 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 587 ms 1116 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 674 ms 5528 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -