oj.uz

Submission #89319

# Submission time Handle Problem Language Result Execution time Memory
89319 2018-12-11T17:53:39 Z vvash17 Triumphal arch (POI13_luk) C++14
70 / 100
 2000 ms 23900 KB 

#include <cstdio>
#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++){
		if(been_there[graph[search_start][i]] == 0){
			available_neigbours++;
			sub_tree_res += evaluate_result(graph[search_start][i],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];
	for(int i = 0; i<=city_num; i++)been_there[i] = 0;
	return evaluate_result(1,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:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&city_num);
  ~~~~~^~~~~~~~~~~~~~~~
luk.cpp:36:8: 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 7288 KB Output is correct
2 Correct 7 ms 7412 KB Output is correct
3 Correct 7 ms 7616 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 7616 KB Output is correct
2 Correct 7 ms 7616 KB Output is correct
3 Correct 7 ms 7616 KB Output is correct
4 Correct 7 ms 7616 KB Output is correct
5 Correct 7 ms 7616 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 7616 KB Output is correct
2 Correct 7 ms 7640 KB Output is correct
3 Correct 7 ms 7640 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 7660 KB Output is correct
2 Correct 8 ms 7664 KB Output is correct
3 Correct 8 ms 7664 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 8004 KB Output is correct
2 Correct 13 ms 8172 KB Output is correct
3 Correct 34 ms 8172 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 8684 KB Output is correct
2 Correct 29 ms 9588 KB Output is correct
3 Correct 287 ms 9588 KB Output is correct

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 203 ms 11340 KB Output is correct
2 Correct 103 ms 13164 KB Output is correct
3 Execution timed out 2099 ms 13164 KB Time limit exceeded

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 664 ms 15044 KB Output is correct
2 Correct 306 ms 19648 KB Output is correct
3 Execution timed out 2052 ms 19648 KB Time limit exceeded

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 966 ms 19648 KB Output is correct

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 792 ms 19648 KB Output is correct
2 Correct 468 ms 23900 KB Output is correct
3 Execution timed out 2025 ms 23900 KB Time limit exceeded