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  1. /******************************************************************************
  2.  
  3. Welcome to GDB Online.
  4. GDB online is an online compiler and debugger tool for C/C++.
  5. Code, Compile, Run and Debug online from anywhere in world.
  6.  
  7. *******************************************************************************/
  8. #include <iostream>
  9. #include <bits/stdc++.h>
  10. using namespace std;
  11.  
  12. vector < vector < int > > finalVec;
  13.  
  14. void printArray(int p[], int n)
  15. {
  16. 	vector < int > vec;
  17.     for (int i = 0; i < n; i++)
  18.        vec.push_back(p[i]);
  19.     finalVec.push_back(vec);
  20.     return;
  21. }
  22.  
  23. void printAllUniqueParts(int n)
  24. {
  25.     int p[n]; // An array to store a partition
  26.     int k = 0;  // Index of last element in a partition
  27.     p[k] = n;  // Initialize first partition as number itself
  28.  
  29.     // This loop first prints current partition, then generates next
  30.     // partition. The loop stops when the current partition has all 1s
  31.     while (true)
  32.     {
  33.         // print current partition
  34.         printArray(p, k+1);
  35.  
  36.         // Generate next partition
  37.  
  38.         // Find the rightmost non-one value in p[]. Also, update the
  39.         // rem_val so that we know how much value can be accommodated
  40.         int rem_val = 0;
  41.         while (k >= 0 && p[k] == 1)
  42.         {
  43.             rem_val += p[k];
  44.             k--;
  45.         }
  46.  
  47.         // if k < 0, all the values are 1 so there are no more partitions
  48.         if (k < 0)  return;
  49.  
  50.         // Decrease the p[k] found above and adjust the rem_val
  51.         p[k]--;
  52.         rem_val++;
  53.  
  54.  
  55.         // If rem_val is more, then the sorted order is violeted.  Divide
  56.         // rem_val in differnt values of size p[k] and copy these values at
  57.         // different positions after p[k]
  58.         while (rem_val > p[k])
  59.         {
  60.             p[k+1] = p[k];
  61.             rem_val = rem_val - p[k];
  62.             k++;
  63.         }
  64.  
  65.         // Copy rem_val to next position and increment position
  66.         p[k+1] = rem_val;
  67.         k++;
  68.     }
  69. }
  70.  
  71.  
  72. int main() {
  73. 	// your code goes here
  74. 	int n; cin >> n;
  75.  
  76. 	printAllUniqueParts(n);
  77. 	cout << "size : " << finalVec.size() << endl;
  78. 	multiset < int > :: iterator it;
  79.  
  80. 	int ANS = 0;
  81. 	vector < int > ansVec;
  82. 	for (int i = 0; i < finalVec.size(); i++) {
  83. 		multiset < int > mySet;
  84.  
  85. 		vector < int > temp = finalVec[i];
  86.  
  87. 		for (int ii = 0; ii < temp.size(); ii++) {
  88. 			mySet.insert(temp[ii]);
  89. 		}
  90.  
  91. 		int t = n + 4;
  92. 		int cnt = 0;
  93. 		while (t --) {
  94. 			multiset < int > newSet;
  95. 			newSet.insert(mySet.size());
  96.  
  97. 			for (it = mySet.begin(); it != mySet.end(); it++) {
  98. 				if(*it > 1) {
  99. 					newSet.insert((*it) - 1);
  100. 				}
  101. 			}
  102.  
  103. 			if(newSet == mySet) {
  104. 				if(cnt > ANS) {
  105. 				    ANS = cnt;
  106. 				    ansVec = temp;
  107. 				}
  108. 				break;
  109. 			}
  110.  
  111. 			cnt++;
  112. 			mySet = newSet;
  113. 		}
  114. 	}
  115.  
  116. 	cout << ANS << endl;
  117. 	for (int i = 0; i < ansVec.size(); i++) cout << ansVec[i] << ' ';
  118. 	cout << endl;
  119.  
  120. 	return 0;
  121. }
  122.  
  123.  
  124.  
Success #stdin #stdout 2.03s 11724KB
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size : 89134
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https://ideone.com/2wAMfE
language:
C++14 (gcc 8.3)
created:
12 hours ago
visibility:
public

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