Submission #244425

#	Time	Username	Problem	Language	Result	Execution time	Memory
244425		dwsc	Calvinball championship (CEOI15_teams)	C++14	20 / 100	36 ms	33016 KiB

teams

#include <bits/stdc++.h>
#define int long long
using namespace std;
int MOD = 1e9+7;
int memo[1010][1010][2];
int maxi[1010],arr[1010];
int n;
int dp(int pos,int largest,int ssf){
    if (pos == n) return 1;
    if (memo[pos][largest][ssf] != -1) return memo[pos][largest][ssf];
    if (ssf){
        int curnum = arr[pos];
        int ans = ((curnum-1)*dp(pos+1,largest,0))%MOD;
        ans += dp(pos+1,max(largest,curnum),1);
        return memo[pos][largest][ssf] = ans%MOD;
    }
    else{
        int ans = (largest*dp(pos+1,largest,0))%MOD + dp(pos+1,largest+1,0);
        return memo[pos][largest][ssf] = ans%MOD;
    }
}
main(){
    cin >> n;
    for (int i = 0; i < n; i++){
        int x;
        cin >> x;
        arr[i] = x;
        if (i == 0) maxi[i] = x;
        else maxi[i] = max(maxi[i-1],x);
    }
    for (int i = 0; i < 1010; i++) for (int j = 0; j < 1010; j++) memo[i][j][0] = memo[i][j][1] =-1;
    cout << dp(0,1,1);
}

Compilation message (stderr)

teams.cpp:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10