11843 - Guessing Game/11843.2.cpp

   1 // Accepted
   2 using namespace std;
   3 #include <algorithm>
   4 #include <iostream>
   5 #include <iterator>
   6 #include <numeric>
   7 #include <sstream>
   8 #include <fstream>
   9 #include <cassert>
  10 #include <climits>
  11 #include <cstdlib>
  12 #include <cstring>
  13 #include <string>
  14 #include <cstdio>
  15 #include <vector>
  16 #include <cmath>
  17 #include <queue>
  18 #include <deque>
  19 #include <stack>
  20 #include <list>
  21 #include <map>
  22 #include <set>
  23
  24 #define foreach(x, v) for (typeof (v).begin() x=(v).begin(); x !=(v).end(); ++x)
  25 #define For(i, a, b) for (int i=(a); i<(b); ++i)
  26 #define D(x) cout << #x " is " << x << endl
  27
  28 int memo[1005][25];
  29
  30 int f(int n, int s) {
  31     if (n == 0) return 0;
  32     if (n == 1) return 1;
  33     if (s == 1) return n;
  34
  35     if (memo[n][s] != -1) return memo[n][s];
  36
  37     int best = 1<<28;
  38     for (int i = 0; i < n; ++i) {
  39         int option = 1 + max(   f(i, s-1),  f(n-i-1, s)  );
  40         best = min(best, option);
  41     }
  42     return memo[n][s] = best;
  43 }
  44
  45 int main(){
  46     int C;
  47     cin >> C;
  48     memset(memo, -1, sizeof memo);
  49     while (C--) {
  50         int n, s;
  51         cin >> n >> s;
  52         assert(s > 0 and n > 0);
  53         int ans = f(n, s);
  54         printf("%d\n", ans);
  55     }
  56     return 0;
  57 }