func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, k, a[100100], sum = 0, Min = 1e6;   int main() {     cin >> n >> k;     for (int i = 0; i < n; i++) cin >> a[i];     for (int i = 0; i < n; i++) {       if (a[i] < 0 && k) a[i] *= -1, k--;       Min = min(Min, abs(a[i]));       sum += a[i];     }     if (k & 1) sum -= Min * 2;     cout << sum;     return 0;   }   