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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define what_is(x) cerr << #x << " is " << x << endl;
  4. #define IOS ios::sync_with_stdio(false); cin.tie(0);
  5. #define st first
  6. #define nd second
  7.  
  8. typedef long long ll;
  9. typedef pair<int,int> pii;
  10. const int N = 200+5;
  11. const int INF = 1e9;
  12. const int MOD = 1e9+7;
  13.  
  14. int n, m;
  15. int a[N];
  16. int main()
  17. {
  18. 	IOS
  19. 	// freopen("input.txt", "r", stdin);
  20. 	// freopen("output.txt", "w", stdout);
  21. 	int tc = 1;
  22. 	while(cin >> n){
  23. 		for(int i=1; i<=n; i++) cin >> a[i];
  24. 		vector<tuple<int,int,int>> edges;
  25. 		vector<int> g[n+2];
  26. 		cin >> m;
  27. 		while(m--){
  28. 			int u, v; cin >> u >> v;
  29. 			edges.push_back({u, v, pow(a[v]-a[u], 3)});
  30. 			g[u].push_back(v);
  31. 		}
  32. 		vector<int> d(n+2, INF);
  33. 		d[1] = 0; //source 1
  34. 		for(int i=1; i<=n-1; i++){
  35. 			for(auto e:edges){
  36. 				int u, v, w; tie(u, v, w) = e;
  37. 				// what_is(u); what_is(v); what_is(w);
  38. 				if (d[u] == INF) continue;
  39. 				d[v] = min(d[v], d[u]+w);
  40. 			}
  41. 		}
  42.  
  43. 		for(auto e:edges){
  44. 			int u, v, w; tie(u, v, w) = e;
  45. 			if (d[u] == INF) continue;
  46. 			if (d[u] + w < d[v]) {
  47. 				d[v] = -INF;
  48. 			}
  49. 		}
  50. 		int q; cin >> q;
  51. 		cout << "Set #" << tc++ << endl;
  52. 		while(q--){
  53. 			int des; cin >> des;
  54. 			if (d[des] < 3 || d[des] == INF) cout << "?" << endl;
  55. 			else cout << d[des] << endl;
  56. 		}
  57. 	}
  58.  
  59. 	return 0;
  60. }
  61.  
Success #stdin #stdout 0s 4324KB
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https://ideone.com/TfuoGz
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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