oj.uz

답안 #88838

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
88838 2018-12-09T07:34:26 Z zviki Triumphal arch (POI13_luk) C++14
0 / 100
 447 ms 29472 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>

#define avg(a ,b) ((a + b) / 2)

using namespace std;

vector<vector<int>> map_of_cities;

int num_not_satisfy(set<int> & visited_set, int num_workers, int city)
{	
	int i, child_city, num_children = map_of_cities[city].size(), rec_res;
	visited_set.insert(city);
	for (i = 0, rec_res = 0; i < num_children; i++) {
		child_city = map_of_cities[city][i];
		if (visited_set.find(child_city) !=  visited_set.end()) {
			rec_res += num_not_satisfy(visited_set, num_workers, child_city);
		}	
	}
	if (num_children + rec_res < num_workers) {
		return 0;
	} else {
		return num_children + rec_res - num_workers;
	}
}

int main() 
{
	int n, i, res, bsearch_start, bsearch_end, bsearch_mid, road_from, road_to; 	
	cin >> n;
	for (i = 0; i < n; i++) { 
		vector<int> temp;
		map_of_cities.push_back(temp);
	}
	for (i = 1; i < n; i++) {
		cin >> road_from >> road_to;
		map_of_cities[road_from - 1].push_back(road_to - 1);
		map_of_cities[road_to - 1].push_back(road_from - 1);
	}

	bsearch_start = 0, bsearch_end = n;

	for (; bsearch_start < bsearch_end; ) {
		bsearch_mid = avg(bsearch_start, bsearch_end);
		set<int> visited_set;
		res = num_not_satisfy(visited_set, bsearch_mid, 0);
		if (res != 0) {
			bsearch_start = bsearch_mid + 1;
		} else {
			bsearch_end = bsearch_mid;
		}
	}

	res = bsearch_start;
	cout << res << endl;
	return 0;
}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 512 KB Output is correct
2 Incorrect 1 ms 512 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 556 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 556 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 11 ms 1192 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 32 ms 2716 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 129 ms 7868 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 275 ms 16052 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 447 ms 25548 KB Output isn't correct

Subtask #10
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 418 ms 29472 KB Output isn't correct
2 Halted 0 ms 0 KB -