Submission #89324

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
89324	2018-12-11T18:01:51 Z	vvash17	Triumphal arch (POI13_luk)	C++14	70 / 100	2000 ms	25340 KB


#include <iostream>
#include <vector>
#include <map>
using namespace std;

vector<int> graph[300001];
int city_num,from,to;

int evaluate_result(int &search_start,int &need_num,int been_there[]){
	int available_neigbours = 0;
	int sub_tree_res = 0;
	
	been_there[search_start]++;
	
	for(int i = 0; i<graph[search_start].size(); i++){
		int tmp = graph[search_start][i];
		if(been_there[tmp] == 0){
			available_neigbours++;
			sub_tree_res += evaluate_result(tmp,need_num,been_there);
		}
	}
	
	int res = available_neigbours-(need_num-sub_tree_res);
	if(res < 0)return 0;
	return res;
}
int search_init(int &need_num){
	int been_there[city_num+1] = {0};
	int start = 1;
	return evaluate_result(start,need_num,been_there);
}
int main() {
	scanf("%d",&city_num);
	for(int i = 1; i<city_num; i++){
		scanf("%d %d",&from,&to);
		graph[from].push_back(to);
		graph[to].push_back(from);
	}
	int result = 0;
	
	for(int need_num = 0; need_num<=city_num; need_num++){
		result = search_init(need_num);
		if(result == 0){
			result = need_num;
			break;
		}
	}
	
	printf("%d",result);
    return 0;
}

Compilation message

luk.cpp: In function 'int evaluate_result(int&, int&, int*)':
luk.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i<graph[search_start].size(); i++){
                 ~^~~~~~~~~~~~~~~~~~~~~~~~~~~
luk.cpp: In function 'int main()':
luk.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&city_num);
  ~~~~~^~~~~~~~~~~~~~~~
luk.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&from,&to);
   ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	7416 KB	Output is correct
2	Correct	9 ms	7524 KB	Output is correct
3	Correct	7 ms	7524 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	7524 KB	Output is correct
2	Correct	9 ms	7524 KB	Output is correct
3	Correct	9 ms	7524 KB	Output is correct
4	Correct	8 ms	7524 KB	Output is correct
5	Correct	8 ms	7556 KB	Output is correct

Subtask #3
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	7556 KB	Output is correct
2	Correct	9 ms	7556 KB	Output is correct
3	Correct	8 ms	7572 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	9 ms	7700 KB	Output is correct
2	Correct	9 ms	7700 KB	Output is correct
3	Correct	9 ms	7760 KB	Output is correct

Subtask #5
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	18 ms	7904 KB	Output is correct
2	Correct	15 ms	8160 KB	Output is correct
3	Correct	41 ms	8160 KB	Output is correct

Subtask #6
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	42 ms	8672 KB	Output is correct
2	Correct	29 ms	9824 KB	Output is correct
3	Correct	346 ms	9824 KB	Output is correct

Subtask #7
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	150 ms	11360 KB	Output is correct
2	Correct	131 ms	13708 KB	Output is correct
3	Execution timed out	2043 ms	13708 KB	Time limit exceeded

Subtask #8
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	470 ms	15096 KB	Output is correct
2	Correct	212 ms	20960 KB	Output is correct
3	Execution timed out	2054 ms	20960 KB	Time limit exceeded

Subtask #9
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1008 ms	20960 KB	Output is correct

Subtask #10
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	820 ms	20960 KB	Output is correct
2	Correct	423 ms	25340 KB	Output is correct
3	Execution timed out	2047 ms	25340 KB	Time limit exceeded