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  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int src, dst, price = INT_MAX, fsrc, fdst, fprice = INT_MAX;
  6. vector<vector<pair<int,int>>> adj;
  7. vector<bool> visited;
  8.  
  9. void dfs(int i, int sum) {
  10. 	visited[i] = true;
  11. 	for (auto x: adj[i]) {
  12. 		int c = x.first, p = x.second;
  13. 		if (!visited[c]) {
  14. 			dfs(c, sum + p);
  15. 		}
  16. 		else if (c == src) {
  17. 			if (price > sum + p) {
  18. 				price = sum + p;
  19. 				dst = i;
  20. 			}
  21. 		}
  22. 	}
  23. }
  24. int main () {
  25. 	int n;
  26. 	cin >> n;
  27. 	int flights;
  28. 	cin >> flights;
  29. 	adj = vector<vector<pair<int,int>>>(n);
  30.  
  31. 	for (int i = 0; i < flights; ++i) {
  32. 		int x,y,z;
  33. 		cin >> x >> y >> z;
  34. 		adj[x].push_back({y, z});
  35. 	}
  36.  
  37. 	for (int i = 0; i < n; ++i) {
  38. 		visited = vector<bool>(n, false);
  39. 		src = i;
  40. 		dfs(i, 0);
  41. 		if (price < fprice) {
  42. 			fsrc = src;
  43. 			fdst = dst;
  44. 			fprice = price;
  45. 		}
  46. 	}
  47.  
  48. 	cout << fprice << endl;
  49. 	cout << fsrc << endl;
  50. 	cout << fdst << endl;}
  51.  
Success #stdin #stdout 0.01s 5308KB
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https://ideone.com/GtGPOU
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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