oj.uz

Submission #552891

# Submission time Handle Problem Language Result Execution time Memory
552891 2022-04-24T09:18:32 Z M_W Skyscraper (JOI16_skyscraper) C++14
5 / 100
 2000 ms 304 KB 
#include <bits/stdc++.h>
using namespace std;
bool vis[102];
set<int> s;
int a[102];
int N, L, ans = 0;

void sol(int idx, int sm, int old){
	if(idx > N && sm <= L){
		ans++;
		return;
	}
	if(idx > 1){
		int tmp = sm;
		auto it1 = s.begin();
		auto it2 = s.end(); it2--;
		tmp += min(abs(a[old] - *it1), abs(a[old] - *it2));
		
		if(s.size() > 1) tmp += abs(*it2 - *it1);
		if(tmp > L) return;
	}
	
	for(int i = 1; i <= N; i++){
		if(vis[i]) continue;
		vis[i] = true;
		s.erase(a[i]);
		sol(idx + 1, sm + abs((old == -1 ? a[i] : a[old]) - a[i]), i);
		s.insert(a[i]);
		vis[i] = false;
	}
}

int main(){
	scanf("%d %d", &N, &L);
	for(int i = 1; i <= N; i++){
		scanf("%d", &a[i]);
		s.insert(a[i]);
	}
	sort(a + 1, a + N + 1);
	sol(1, 0, -1);
	printf("%d", ans);
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  scanf("%d %d", &N, &L);
      |  ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 304 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 8 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 7 ms 296 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2088 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 304 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 8 ms 300 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 7 ms 296 KB Output is correct
11 Execution timed out 2088 ms 212 KB Time limit exceeded
12 Halted 0 ms 0 KB -