Submission #96780

#	Time	Username	Problem	Language	Result	Execution time	Memory
96780		Retro3014	Calvinball championship (CEOI15_teams)	C++17	100 / 100	677 ms	632 KiB

teams

#include <iostream>
#include <vector>
#include <algorithm>
#include <stdio.h>

using namespace std;
#define DIV 1000007
#define MAX_N 10000
typedef long long ll;

int N;
ll DP1[MAX_N+1], DP2[MAX_N+1];
int arr[MAX_N+1];

int main(){
	scanf("%d", &N);
	for(int i=1; i<=N; i++){
		scanf("%d", &arr[i]);
	}
	int mx = 0;
	for(int i=1; i<=N; i++){
		for(int j=1; j<=N; j++){
			DP2[j] =(DP1[j] * (ll)j + DP1[j -1]) % DIV;
		}
		for(int j=1; j<arr[i]; j++){
			DP2[max(mx, j)] = (DP2[max(mx, j)]+1)%DIV;
		}
		mx = max(mx, arr[i]);
		for(int j=0; j<=N; j++){
			DP1[j] = DP2[j]; DP2[j] = 0;
		}
	}
	ll ans = 0;
	for(int i=1; i<=N; i++){
		ans = (ans+DP1[i])%DIV;
	}
	printf("%lld", ans+1);
	return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
teams.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &arr[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