oj.uz

Submission #55320

# Submission time Handle Problem Language Result Execution time Memory
55320 2018-07-07T01:15:14 Z IvanC Sirni (COCI17_sirni) C++17
112 / 140
 5000 ms 520284 KB 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int,int> ii;
 
const int MAXN = 1e7 + 1;
 
int pai[MAXN],proximo[MAXN],N,conjuntos;
vector<int> ordenado;
vector<ii> Kruskal[MAXN]; 
 
int find(int x){
	if(x == pai[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;
	conjuntos--;
	if(rand() & 1) swap(x,y);
	pai[y] = x;
}
 
int main(){
 
	scanf("%d",&N);
	for(int i = 1;i<=N;i++){
		int x;
		scanf("%d",&x);
		if(pai[x] == x) continue;
		pai[x] = x;
		conjuntos++;
	}
 
	for(int i = 1;i<MAXN;i++){
		if(pai[i] == 0) continue;
		ordenado.push_back(i);
		for(int j = 2*i;j<MAXN;j+=i) if(pai[j] != 0) join(i,j);
	}
 
	int ultimo_visto = ordenado.back();
 
	for(int i = MAXN-1;i>=1;i--){
		proximo[i] = ultimo_visto;
		if(!ordenado.empty() && ordenado.back() == i){
			ultimo_visto = i;
			ordenado.pop_back();
		}
	}
 
 	if(conjuntos == 1){
 		printf("0\n");
 		return 0;
 	}

	for(int i = 1;i<MAXN;i++){
		if(pai[i] == 0) continue;
		ultimo_visto = -1;
		for(int j = i;j<MAXN;j+=i){
			int candidato = proximo[j];
			if(candidato == ultimo_visto) continue;
			ultimo_visto = candidato;
			Kruskal[candidato % i].push_back(ii(i,candidato));
		}
	}
 
	ll total = 0;
	for(int w = 0;w<MAXN && conjuntos > 1;w++){
 	
		for(ii davez : Kruskal[w]){
			int u = davez.first, v = davez.second;
			if(find(u) != find(v)){
				join(u,v);
				total += w;
			}
		}
		
	}
 
	printf("%lld\n",total);
 
	return 0;
}

Compilation message

sirni.cpp: In function 'int main()':
sirni.cpp:28:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
  ~~~~~^~~~~~~~~
sirni.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
   ~~~~~^~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 297 ms 278136 KB Output is correct
2 Correct 410 ms 278756 KB Output is correct
3 Correct 301 ms 278756 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 433 ms 278756 KB Output is correct
2 Correct 847 ms 278756 KB Output is correct
3 Correct 298 ms 278756 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 307 ms 278768 KB Output is correct
2 Correct 299 ms 278768 KB Output is correct
3 Correct 301 ms 278768 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 756 ms 290276 KB Output is correct
2 Correct 1718 ms 315072 KB Output is correct
3 Correct 758 ms 315072 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 382 ms 315072 KB Output is correct
2 Correct 1387 ms 315072 KB Output is correct
3 Correct 905 ms 315072 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1273 ms 315072 KB Output is correct
2 Correct 1954 ms 330020 KB Output is correct
3 Correct 805 ms 330020 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 774 ms 330020 KB Output is correct
2 Correct 2174 ms 330020 KB Output is correct
3 Correct 747 ms 330020 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 751 ms 330020 KB Output is correct
2 Correct 4727 ms 520284 KB Output is correct
3 Correct 803 ms 520284 KB Output is correct

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 649 ms 520284 KB Output is correct
2 Execution timed out 5102 ms 520284 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 411 ms 520284 KB Output is correct
2 Execution timed out 5062 ms 520284 KB Time limit exceeded
3 Halted 0 ms 0 KB -