fork download 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. const int MAX_LENGTH = 30000;
  5.  
  6. int main() {
  7. 	int n, m, v[MAX_LENGTH + 1];
  8. 	cin >> n >> m;
  9. 	for (int i = 1; i <= n; ++i) {
  10. 		cin >> v[i] ;
  11. 		//cout << v[i] <<" ";
  12. 	}
  13. 	//cout << 5 / 2;
  14. 	int counter = 0;
  15. 	for (int i = 1, aux = 0; i <= n ; ++i, ++aux) {
  16. 		if (v[i] != v[n - aux]) {
  17. 			++counter;
  18. 		}
  19. 	}
  20.  
  21.  
  22. 	cout <<counter <<  "\n";
  23. 	int i = 1;
  24. 	int modifPos = 0, newVal = 0;
  25. 	while (i++ <= m){
  26. 		int newCounter = 0;
  27. 		cin >> modifPos >> newVal;
  28. 		for (int i = 1; i <= n; ++i) {
  29. 			if (i == modifPos) {
  30. 				v[i] = newVal;
  31. 			}
  32. 		}
  33. 		for (int i = 1, aux = 0; i < n ; ++i, ++aux) {
  34. 			if (v[i] != v[n - aux]) {
  35. 				++newCounter;
  36. 			}
  37. 		}
  38. 		cout << newCounter << "\n";
  39. 		//cout << modifPos <<  newVal << "\n";
  40. 	//	++i;
  41. 	}
  42. 	return 0;
  43. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
7 3 
1 0 1 0 1 0 1
2 2 
4 2 
6 2
stdout 
0
2
2
0
https://ideone.com/f8LFWt
language:
C++14 (gcc 8.3)
created:
14 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!