Submission #810973

#	Time	Username	Problem	Language	Result	Execution time	Memory
810973		JakobZorz	Calvinball championship (CEOI15_teams)	C++14	100 / 100	727 ms	1012 KiB

teams

#include <iostream>
#include <vector>
#include <queue>
#include <algorithm>
#include <set>
#include <stack>
#include <limits.h>
#include <math.h>
#include <iomanip>
#include <bitset>
#include <unordered_map>
#include <unordered_set>
#include <map>
#include <cstring>
#include <sstream>
 
#pragma GCC target("popcnt")
 
typedef long long ll;
typedef long double ld;
using namespace std;
const int MOD=1e6+7;
typedef pair<ll,ll>point;
//#define x first
//#define y second
 
int n;
int arr[10000];
ll dp[2][20000][2];

int main(){
    ios::sync_with_stdio(false);
    cout.tie(NULL);
    cin.tie(NULL);
    
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>arr[i];
        arr[i]--;
    }
    
    
    for(int teams=-1;teams<=n;teams++){
        dp[1][teams+1][0]=1;
        dp[1][teams+1][1]=1;
    }
    
    for(int i=n-1;i>=0;i--){
        for(int teams=-1;teams<20000;teams++){
            {
                ll res=0;
                
                res+=(teams+1)*dp[1][teams+1][0];
                
                res+=dp[1][teams+2][0];
                res%=MOD;
                
                dp[0][teams+1][0]=res;
            }
            
            {
                ll res=0;
                
                res+=min(teams+1,arr[i])*dp[1][teams+1][0];
                if(teams>=arr[i])
                    res+=dp[1][teams+1][1];
                
                if(teams+1<=arr[i])
                    res+=dp[1][teams+2][teams+1==arr[i]];
                res%=MOD;
                
                dp[0][teams+1][1]=res;
            }
        }
        
        memcpy(dp[1],dp[0],20000*2*sizeof(ll));
    }
    
    cout<<dp[0][0][1]<<"\n";
    
    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:72:34: warning: iteration 20000 invokes undefined behavior [-Waggressive-loop-optimizations]
   72 |                 dp[0][teams+1][1]=res;
      |                 ~~~~~~~~~~~~~~~~~^~~~
teams.cpp:49:31: note: within this loop
   49 |         for(int teams=-1;teams<20000;teams++){
      |                          ~~~~~^~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10