Submission #1133263

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133263		ByeWorld	Calvinball championship (CEOI15_teams)	C++20	70 / 100	26 ms	8520 KiB

teams

#include <bits/stdc++.h>
#define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<char,char> pcc;
typedef pair<int,pii> ipii;
typedef pair<pii,pii> ipiii;
const int MAXN = 1e3+20;
const int SQRT = 610;
const int MAXA = 50;
const int MOD = 1e6+7;
const int INF = 1e9+10;
const int LOG = 21;
const ld EPS = 1e-12;
int sum(int a, int b){ return (a+b)%MOD; }
int mul(int a, int b){ return (1ll*a*b)%MOD; }
void chsum(int &a, int b){ a = (a+b)%MOD; }
void chmul(int &a, int b){ a = (1ll*a*b)%MOD; }

int n, dp[MAXN][MAXN], a[MAXN];

signed main(){
    // ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i=0; i<=n; i++) dp[0][i] = 1;
    for(int i=1; i<=n; i++){
        for(int j=1; j<=n; j++){
            dp[i][j] = sum(mul(j-1, dp[i-1][j]), dp[i-1][j+1]);
        }
    }
    // cout<<dp[2][2]<< ' '<<dp[1][3]<<" pp\n";
    int ans = 1, mx = 1;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=2; i<=n; i++){
        if(a[i]==1) continue;
        for(int j=1; j<=a[i]-1; j++)
            chsum(ans, dp[n-i][max(mx+1, j+1)] );

        mx = max(mx, a[i]);
    }

    cout << ans << '\n';
}

• 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