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  1. // iostream is too mainstream
  2. #include <cstdio>
  3. // bitch please
  4. #include <iostream>
  5. #include <vector>
  6. #include <set>
  7. #include <map>
  8. #include <string>
  9. #include <queue>
  10. #include <stack>
  11. #include <algorithm>
  12. #include <cmath>
  13. #include <iomanip>
  14. #define dibs reserve
  15. #define OVER9000 1234567890
  16. #define patkan 9
  17. #define tisic 47
  18. #define soclose 1e-9
  19. #define pi 3.1415926535898
  20. #define ALL_THE(CAKE,LIE) for(auto LIE =CAKE.begin(); LIE != CAKE.end(); LIE++)
  21. #define chocolate win
  22. #define ff first
  23. #define ss second
  24. #define abs(x) ((x < 0)?-(x):(x))
  25. #define uint unsigned int
  26. #include <time.h>
  27. // mylittlepony
  28. using namespace std;
  29.  
  30. int main() {
  31. //	freopen("fcount.in","r",stdin);
  32. //	freopen("fcount.out","w",stdout);
  33. 	int N;
  34. 	scanf(" %d",&N);
  35. 	vector< pair<int,int> > A(N+1);
  36. 	for(int i =0; i <= N; i++) {
  37. 		scanf(" %d",&A[i].ff);
  38. 		A[i].ss =i;}
  39. 	sort(A.begin(),A.end());
  40.  
  41. 	vector<int> ans;
  42. 	for(int i =0; i <= N; i++) {
  43. 		bool b =true;
  44. 		vector<int> B;
  45. 		for(int j =0; j < i; j++) B.push_back(A[j].ff);
  46. 		for(int j =i+1; j <= N; j++) B.push_back(A[j].ff);
  47. 		reverse(B.begin(),B.end());
  48. 		long long S =0;
  49. 		for(int j =0; j < N; j++) {
  50. 			S +=B[j];
  51. 			long long K =j*(j+1);
  52. 			for(int k =j+1; k < N; k++) K +=min(j+1,B[k]);
  53. 			if(S > K) {
  54. 				b =false;
  55. 				break;}}
  56. 		if(S%2 != 0) b =false;
  57. 		if(b) ans.push_back(A[i].ss);}
  58.  
  59. 	sort(ans.begin(),ans.end());
  60. 	printf("%d\n",ans.size());
  61. 	for(uint i =0; i < ans.size(); i++) printf("%d\n",ans[i]+1);
  62. 	return 0;}
  63.  
  64. // look at my code
  65. // my code is amazing
  66.  
Runtime error #stdin #stdout #stderr 0s 3432KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
https://ideone.com/jpdY0i
USACO 2013/14 March
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
secret

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