oj.uz

Submission #489805

# Submission time Handle Problem Language Result Execution time Memory
489805 2021-11-24T18:07:01 Z keta_tsimakuridze Cities (BOI16_cities) C++14
74 / 100
 6000 ms 239804 KB 
#include<bits/stdc++.h>
#define f first
#define s second
#define pii pair<int,int>
#define int long long
#define Pii pair<int,pii> 
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7, inf = 1e16; // !
int t,n,m,dp[N][35],k;
vector<pii> V[N];
priority_queue<Pii, vector<Pii>, greater<Pii> > q;
main() {
	cin >> n >> k >> m;
	for(int i = 1; i <= n; i++) for(int j = 1; j < (1 << k); j++) dp[i][j] = inf;
	
	for(int i = 1; i <= k; i++) {
		int b;
		cin >> b;
		dp[b][1 << (i - 1)] = 0;
		q.push({0, {b, 1 << (i - 1)}});
	}	
	for(int i = 1; i <= m; i++) {
		int u,v,w;
		cin >> u >> v >> w;
		V[u].push_back({v,w});
		V[v].push_back({u,w});
	}
	while(q.size()) {
		int d = q.top().f;
		int u = q.top().s.f;
		int t = q.top().s.s;
		q.pop();
		
		if(d > dp[u][t]) continue;
		int x = ((1 << k) - 1) ^ t;
		for(int i = x; ; i = (i - 1) & x) {
			for(int j = 0; j < V[u].size(); j++) {
				if(dp[V[u][j].f][t ^ i] > V[u][j].s + d + dp[V[u][j].f][i]) {
					dp[V[u][j].f][t ^ i] = V[u][j].s + d + dp[V[u][j].f][i];
					q.push({V[u][j].s + d + dp[V[u][j].f][i], {V[u][j].f, t ^ i}});
				}
			}
			if(i == 0) break;
		}
	}
	int ans = inf;
	for(int i = 1; i <= n; i++) {
		ans = min(ans, dp[i][(1 << k) - 1]);
	}
	cout << ans;
}

Compilation message

cities.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   12 | main() {
      | ^~~~
cities.cpp: In function 'int main()':
cities.cpp:37:21: 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]
   37 |    for(int j = 0; j < V[u].size(); j++) {
      |                   ~~^~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1096 ms 67584 KB Output is correct
2 Correct 1050 ms 71020 KB Output is correct
3 Correct 524 ms 45952 KB Output is correct
4 Correct 187 ms 19136 KB Output is correct
5 Correct 511 ms 53408 KB Output is correct
6 Correct 179 ms 18508 KB Output is correct
7 Correct 7 ms 5692 KB Output is correct
8 Correct 5 ms 5504 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 6216 KB Output is correct
2 Correct 12 ms 6220 KB Output is correct
3 Correct 8 ms 5776 KB Output is correct
4 Correct 10 ms 6088 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3148 ms 141360 KB Output is correct
2 Correct 3054 ms 140708 KB Output is correct
3 Correct 1578 ms 62344 KB Output is correct
4 Correct 2001 ms 82736 KB Output is correct
5 Correct 551 ms 45136 KB Output is correct
6 Correct 260 ms 22892 KB Output is correct

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 6039 ms 239804 KB Time limit exceeded
2 Halted 0 ms 0 KB -