oj.uz

Submission #307550

# Submission time Handle Problem Language Result Execution time Memory
307550 2020-09-28T15:16:22 Z luciocf Sirni (COCI17_sirni) C++14
84 / 140
 5000 ms 527632 KB 
#include <bits/stdc++.h>
 
#define ff first
#define ss second
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
 
const int maxn = 1e5+10;
 
struct DSU
{
	int pai[maxn], peso[maxn];
 
	void init(int n)
	{
		for (int i = 1; i <= n; i++)
			pai[i] = i, peso[i] = 1;
	}
 
	int Find(int x)
	{
		if (pai[x] == x) return x;
		return pai[x] = Find(pai[x]);
	}
 
	void Join(int x, int y)
	{
		x = Find(x), y = Find(y);
		if (x == y) return;
 
		if (peso[x] < peso[y]) swap(x, y);
 
		pai[y] = x, peso[x] += peso[y];
	}
} dsu;
 
int a[maxn];
 
int main(void)
{
	int n;
	scanf("%d", &n);
 
	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);
 
	sort(a+1, a+n+1);
 	
 	int m = 0;
	dsu.init(n);

	vector<pii> V;
 
	for (int i = 1; i <= n; i++)
	{
		int j;
		for (j = i; j <= n && a[i] == a[j]; j++)
			if (j != i)
				dsu.Join(i, j), m++;

		i = j-1;
			
		for (int v = a[i]; v <= a[n]; v += a[i])
			V.push_back({v, i});
	}
 
	sort(V.begin(), V.end());
 
	set<pair<int, pii>> st;
 
	for (int i = 2; i <= n; i++)
		st.insert({a[i]-a[i-1], {i-1, i}});
 
	int ptr = (int)V.size()-1;
 
	for (int i = n; i >= 1; i--)
	{
		while (ptr >= 0 && V[ptr].ff > a[i])
			ptr--;
 
		while (ptr >= 0 && V[ptr].ff > a[i-1])
		{
			st.insert({a[i]-V[ptr].ff, {i, V[ptr].ss}});
			ptr--;
		}
	}
 
 
	ll ans = 0;
 
	for (auto pp: st)
	{
		if (m == n-1) break;

		int u = pp.ss.ff, v = pp.ss.ss, w = pp.ff;
 
		if (dsu.Find(u) != dsu.Find(v))
		{
			ans += 1ll*w;
			dsu.Join(u, v), ++m;
		}
	}
 
	printf("%lld\n", ans);
}

Compilation message

sirni.cpp: In function 'int main()':
sirni.cpp:45:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
sirni.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 768 KB Output is correct
2 Correct 2423 ms 195608 KB Output is correct
3 Correct 9 ms 2044 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 896 KB Output is correct
2 Execution timed out 5090 ms 525900 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 768 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 5 ms 1152 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 667 ms 82112 KB Output is correct
2 Correct 2205 ms 302104 KB Output is correct
3 Correct 1216 ms 160792 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 14180 KB Output is correct
2 Correct 1339 ms 165912 KB Output is correct
3 Correct 643 ms 83132 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1323 ms 171468 KB Output is correct
2 Correct 2981 ms 421160 KB Output is correct
3 Correct 1059 ms 143676 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 207 ms 29208 KB Output is correct
2 Correct 3233 ms 438228 KB Output is correct
3 Correct 1137 ms 151168 KB Output is correct

Subtask #8
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1174 ms 102012 KB Output is correct
2 Execution timed out 5066 ms 527052 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1602 ms 138428 KB Output is correct
2 Execution timed out 5125 ms 527632 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 144 ms 14948 KB Output is correct
2 Execution timed out 5042 ms 526920 KB Time limit exceeded
3 Halted 0 ms 0 KB -