Submission #591524

#	Time	Username	Problem	Language	Result	Execution time	Memory
591524		andrei_boaca	Calvinball championship (CEOI15_teams)	C++14	100 / 100	346 ms	612 KiB

teams

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
const ll mod=1e6+7;
ll n,v[10005],dp[3][10005],ans;
int need[10005];
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>v[i];
    int maxim=0;
    for(int i=1;i<=n;i++)
    {
        bool newmax=0;
        if(v[i]>maxim)
        {
            maxim=v[i];
            newmax=1;
        }
        need[n-i]=maxim-newmax;
    }
    need[0]=1;
    for(int i=1;i<=n;i++)
        dp[0][i]=i+1;
    need[1]=dp[0][need[1]];
    for(int i=2;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
        {
            ll val=(1LL*j*dp[0][j])%mod;
            val=(val+dp[0][j+1])%mod;
            dp[1][j]=val;
        }
        need[i]=dp[1][need[i]];
        for(int j=1;j<=n;j++)
            dp[0][j]=dp[1][j];
    }
    maxim=0;
    for(int i=1;i<=n;i++)
    {
        bool newmax=0;
        if(v[i]>maxim)
        {
            maxim=v[i];
            newmax=1;
        }
        ll val=(1LL*((v[i]-1)*need[n-i]))%mod;
        ans=(ans+val)%mod;
    }
    ans++;
    ans%=mod;
    cout<<ans;
    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:43:14: warning: variable 'newmax' set but not used [-Wunused-but-set-variable]
   43 |         bool newmax=0;
      |              ^~~~~~

• 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