Submission #1780289

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n, k; cin >> n >> k;
	string s; cin >> s;
	bool used[n] = {};
	for(int i = 0; i < n; ++i){
		int pos = i;
		if(!used[i]){
			for(int j = i + 1; j < n; ++j){
				if(s[i] == s[j] && used[j]){
					used[i] = 1;
					used[j] = 0;
					break;
				}
			}
		}
		for(int j = i + 1; j < n; ++j){
			if(s[j] < s[pos] && (int)!used[i] + (int)!used[j] <= k) pos = j;
		}
		if(pos != i){
			k -= (int)!used[i] + (int)!used[pos];
			used[i] = used[pos] = 1;
			char temp = s[i];
			s[i] = s[pos];
			s[pos] = temp;
		}else if(used[i]){
			for(int j = i + 1; j < n; ++j){
				if(s[i] == s[j] && !used[j]){
					used[j] = 1;
					used[i] = 0;
					break;
				}
			}
		}
	}
	cout << s << endl;
	return 0;
}

Submission Info

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