C problem CF global round

main.cpp

@@ -0,0 +1,105 @@
+/**
+ *    author:  theHoodeyGuy   
+**/
+
+#include<bits/stdc++.h>
+using namespace std;
+typedef long long ll;
+
+#define endl '\n'
+#define nl '\n'
+
+int dp[101][101][2];
+
+int help(int e,int o,int s){
+
+   // cout << e <<" "<<o<<" "<<s<<" "<<nl;
+   if(o == 0){
+      return 1^s;
+   }
+
+   if(e==0){
+      if((o+1)%4) return s;
+      return 1^s;
+   }
+
+   if(dp[e][o][s] != -1) return dp[e][o][s];
+
+   int ans;
+
+   if(s==0){
+      //take even
+      int ans1=1;
+      if(e >= 2){
+         ans1 = help(e-2,o,s);
+      }
+      ans1 = ans1 and help(e-1,o-1,s);
+
+      //take odd
+      int ans2=1;
+      if(o >= 2){
+         ans2 = help(e,o-2,1);
+      }
+
+      ans2 = ans2 and help(e-1,o-1,1);
+      ans = ans1 or ans2;
+   }
+
+   else{
+      //take even
+      int ans1=1;
+      if(e >=2){
+         ans1 = help(e-2,o,s);
+      }
+      ans1 = ans1 and help(e-1,o-1,s);
+
+      //take odd
+      int ans2=1;
+      if(o >=2){
+         ans2 = help(e,o-2,0);
+      }
+      ans2 = ans2 and help(e-1,o-1,0);
+      ans = ans1 or ans2;
+   }
+   return dp[e][o][s] = ans;
+}
+
+void solve(){
+
+   int n;
+   cin >> n;
+
+   vector<int> a(n);
+
+   int even = 0,odd = 0;
+
+   for(int i=0;i<n;i++) {
+      cin >> a[i];
+      if(a[i]&1) odd++;
+      else even++;
+   }
+
+   memset(dp,-1,sizeof(dp));
+
+   cout << (help(even,odd,0) ? "Alice" : "Bob" )<< nl;
+}
+
+signed main()
+{
+   ios_base::sync_with_stdio(false);cin.tie(NULL);
+
+   // #ifndef ONLINE_JUDGE
+   //  freopen("input.txt", "r", stdin);
+   //  freopen("output.txt", "w", stdout);
+   // #endif
+
+   int t ;
+   cin>>t;
+   while(t--)
+   {
+      solve();
+   }
+
+//    cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" secs"<<endl;
+   return 0;
+}