Submission #34391

#	Time	Username	Problem	Language	Result	Execution time	Memory
34391		bnahmad15	Calvinball championship (CEOI15_teams)	C++14	100 / 100	476 ms	2172 KiB

teams

#include <bits/stdc++.h>
using namespace std;

const int N = 10010,MOD = 1000007;
int n,ar[N],dp[2][N],mx[N],ans = 1;

int main() {
	
	scanf("%d",&n);
	mx[0]=0;
	for(int i =0 ;i<n;i++){
		scanf("%d",&ar[i]);
		if (i){
			mx[i]=max(mx[i-1],ar[i-1]);
		}
	}
	for (int i = 0 ;i <= n+2 ; i++)
		dp[n&1][i]=1;
	for (int i = n-1;i >= 0 ;i--){
		int m = mx[i];
		for (int j =1 ;j < ar[i];j++){
			m = max(m,j);
			ans += dp[(i+1) & 1][m];
			ans %= MOD;
		}
		for (int j = 1; j<=i+1;j++){
			dp[i&1][j]=(long long)dp[(i+1)&1][j]*j % MOD;
			dp[i&1][j] += dp[(i+1)&1][j+1];
			dp[i&1][j]%= MOD;
		}
	}
	cout<<ans;
	return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:9:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
teams.cpp:12:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&ar[i]);
                     ^

• 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