fork download
copy 
  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define int long long
  6. #define bint __int128
  7. #define _3bkarm cin.tie(NULL); cout.tie(NULL); ios::sync_with_stdio(false);
  8.  
  9. const int N = 1001;
  10.  
  11. int dp[N][N];
  12.  
  13. vector<int> have;
  14. int solve(int at, int x) {
  15.     if ( at == have.size() or have[at] > x ) return x;
  16.     int& ans = dp[at][x];
  17.     if (~ans) return ans;
  18.     return ans = min( solve(at + 1, x), solve(at + 1, x - have[at]) );
  19. }
  20.  
  21. void getShitDone() {
  22.     int n, k, l;
  23.     cin >> n >> k >> l;
  24.  
  25.     int r = n - k - l;
  26.     if (l > r) swap(l, r);
  27.  
  28.     if (l == r) {
  29.         if (l == k) {
  30.             if (k == 1) {
  31.                 cout << 2;
  32.             } else if (k == 2) {
  33.                 cout << 3;
  34.             } else if (k == 3) {
  35.                 cout << 3;
  36.             } else if (k == 4) {
  37.                 cout << 2;
  38.             } else {
  39.                 cout << 0;
  40.             }
  41.         } else {
  42.             for (int i = 1; i < r; ++i) if (i != k) have.push_back(i);
  43.             memset( dp, -1, sizeof(dp) );
  44.             cout << solve(0, r);
  45.         }
  46.     } else if (l > k or r < k) {
  47.         cout << 0;
  48.     } else if (l == k) {
  49.         if (k <= 2) {
  50.             cout << 1;
  51.         } else {
  52.             cout << 0;
  53.         }
  54.     } else if (r == k) {
  55.         if (k == 1) {
  56.             if (l == 0) {
  57.                 cout << 1;
  58.             } else {
  59.                 cout << -1;
  60.             }
  61.         } else if (k == 2) {
  62.             if (l == 0) {
  63.                 cout << 1;
  64.             } else if (l == 1) {
  65.                 cout << 2;
  66.             } else {
  67.                 cout << -1;
  68.             }
  69.         } else if (k == 3) {
  70.             if (l == 0) {
  71.                 cout << 0;
  72.             } else if (l == 1) {
  73.                 cout << 1;
  74.             } else if (l == 2) {
  75.                 cout << 2;
  76.             } else {
  77.                 cout << -1;
  78.             }
  79.         } else if (k == 4) {
  80.             if (l == 0) {
  81.                 cout << 0;
  82.             } else if (l == 1) {
  83.                 cout << 1;
  84.             } else if (l == 2) {
  85.                 cout << 0;
  86.             } else if (l == 3) {
  87.                 cout << 1;
  88.             } else {
  89.                 cout << -1;
  90.             }
  91.         } else {
  92.             cout << 0;
  93.         }
  94.     } else {
  95.         cout << 0;
  96.     }
  97. }
  98.  
  99. signed main() {
  100.     _3bkarm
  101.  
  102.     int ts = 1;
  103. //    cin >> ts;
  104.     while (ts--) {
  105.         getShitDone();
  106.         if (ts != 0) cout << '\n';
  107.     }
  108.  
  109.     return 0;
  110. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/71UTTb
language:
C++ (gcc 8.3)
created:
4 days 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!