#include <iostream> #include <vector> using namespace std; typedef long long ll; const ll mod = 1000007; int main() { ios_base::sync_with_stdio(false); cin.tie(); cout.tie(); int n; cin>>n; vector<int> v; vector<ll> dp(n+1,1); vector<ll> dpmax(n+1,0); for(int i=0;i<n;i++) { ll a; cin>>a; v.push_back(a); dpmax[i]=a; if(i) dpmax[i]=max(dpmax[i],dpmax[i-1]); } ll brojac=1; ll maxi=0; for(int i=n-1;i>=0;i--) { int a; if(i==0) a=0; else a=dpmax[i-1]; for(int j=1;j<v[i];j++) { brojac+=dp[max(a,j)]; brojac%=mod; } for(int j=1;j<=i;j++) { dp[j]=1LL*j*dp[j]+dp[j+1]; dp[j]%=mod; } } cout<<brojac<<endl; return 0; }

teams.cpp: In function 'int main()':
teams.cpp:27:8: warning: unused variable 'maxi' [-Wunused-variable]
     ll maxi=0;
        ^~~~