Submission #55196

#	Time	Username	Problem	Language	Result	Execution time	Memory
55196		istlemin	Calvinball championship (CEOI15_teams)	C++14	70 / 100	664 ms	66560 KiB

teams

#include<bits/stdc++.h>

using namespace std;

#define rep(i,a,b) for(int i = a; i<int(b);++i)
#define all(v) v.begin(),v.end()
#define sz(v) v.size()
#define trav(a,c) for(auto a: c)

typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pii;

int main(){
	cin.sync_with_stdio(false);
    ll n;
    cin>>n;
    vi v(n);
    rep(i,0,n) cin>>v[i];

    vector<vector<int> > dp(n+1,vector<int>(n+1,1));

    ll mod = 1e6+7;

    rep(left,1,n+1)
		rep(numTeams,1,n-left+1)
			dp[left][numTeams] = (numTeams*dp[left-1][numTeams] + dp[left-1][numTeams+1])%mod;

    ll numTeams = 1;
    ll ans = 0;
    rep(i,0,n){
		ans = (ans + (v[i]-1)*dp[n-i-1][numTeams])%mod;
        numTeams = max(v[i],numTeams);
    }

    cout<<(ans+1)%mod<<endl;
}

• 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: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10