Submission #46863

#	Time	Username	Problem	Language	Result	Execution time	Memory
46863		HachikujiMayoi	Calvinball championship (CEOI15_teams)	C++14	100 / 100	131 ms	1256 KiB

teams

#include <bits/stdc++.h>

using namespace std;

const int N = 10007;
const long long mod = 1000007;

long long dp[N][2];
int C[N];

int main(){
	int n;
	scanf("%d", &n);
	for(int i = 1; i <= n; ++i){
		scanf("%d", &C[i]);
	}
	int M = 0;
	for(int i = 1; i <= n; ++i){
		int B = i & 1;
		for(int j = 1; j <= i; ++j){
			dp[j][B] = (dp[j][B ^ 1] * j + dp[j - 1][B ^ 1]) % mod;
		}
		dp[M][B] = (dp[M][B] + C[i] - 1) % mod;
		M = max(M, C[i]);
	}
	long long ans = 1;
	for(int i = 1; i <= n; ++i){
		ans += dp[i][n & 1];
		ans %= mod;
	}
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
teams.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &C[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