oj.uz

Submission #781537

# Submission time Handle Problem Language Result Execution time Memory
781537 2023-07-13T07:43:56 Z acatmeowmeow Stove (JOI18_stove) C++11
100 / 100
 27 ms 7392 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long 

int find(int x, vector<int>&par) { return x == par[x] ? x : find(par[x], par); }

bool same(int x, int y, vector<int>&par) { return find(x, par) == find(y, par); }

void unite(int x, int y, vector<int>&sz, vector<int>&par) {
	x = find(x, par), y = find(y, par);
	if (sz[x] < sz[y]) swap(x, y);
	sz[x] += sz[y], par[y] = x;
}


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n, k;
	cin >> n >> k;
	vector<int> arr(n + 5);
	for (int i = 1; i <= n; i++) cin >> arr[i];
	vector<int> sz(n + 5), par(n + 5), mn(n + 5, 1e18), mx(n + 5, -1e18);
	for (int i = 1; i <= n; i++) par[i] = i, sz[i] = 1;
	vector<pair<int, int>> edge;
	for (int i = 2; i <= n; i++) edge.push_back({arr[i] - arr[i - 1], i});
	sort(edge.begin(), edge.end());
	int cc = n;
	for (int i = 0; i < edge.size() && cc > k; i++) {
		int index = edge[i].second;
		if (!same(index, index - 1, par)) unite(index, index - 1, sz, par), cc--;
	}
	for (int i = 1; i <= n; i++) {
		mn[find(i, par)] = min(mn[find(i, par)], arr[i]);
		mx[find(i, par)] = max(mx[find(i, par)], arr[i]);
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		if (find(i, par) == i) {
			ans += mx[i] - mn[i] + 1;
		}
	}
	cout << ans << '\n';
	return 0;
}

Compilation message

stove.cpp: In function 'int main()':
stove.cpp:31:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  for (int i = 0; i < edge.size() && cc > k; i++) {
      |                  ~~^~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 588 KB Output is correct
11 Correct 1 ms 480 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 588 KB Output is correct
11 Correct 1 ms 480 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 25 ms 7124 KB Output is correct
17 Correct 25 ms 7156 KB Output is correct
18 Correct 27 ms 7392 KB Output is correct
19 Correct 26 ms 7376 KB Output is correct
20 Correct 21 ms 7372 KB Output is correct
21 Correct 25 ms 7376 KB Output is correct
22 Correct 22 ms 7320 KB Output is correct
23 Correct 20 ms 7376 KB Output is correct
24 Correct 19 ms 7368 KB Output is correct