Submission #231675

#	Time	Username	Problem	Language	Result	Execution time	Memory
231675		BamiTorabi	Calvinball championship (CEOI15_teams)	C++14	100 / 100	403 ms	632 KiB

teams

//Sasayego! Sasayego! Shinzou wo Sasageyo!

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <ctime>
#include <cstring>
#include <vector>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <numeric>
#include <bitset>
#include <ctime>
#define debug(x)  cerr << #x << " = " << x << endl
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair <ll, ll> pll;
typedef pair <int, int> pii;

const int maxN = 1e4 + 5;
const ll INF = 1e18;
const ll MOD = 1e6 + 7;

int a[maxN], mx[maxN], dp[maxN];

int main(){
	time_t START = clock();
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n; scanf("%d", &n);
	for (int i = 1; i <= n; i++){
		scanf("%d", a + i);
		mx[i] = max(mx[i - 1], a[i]);
		dp[i] = 1;
	}
	ll ans = 0;
	for (int i = n; i; i--){
		ans = (ans + 1ll * (a[i] - 1) * dp[mx[i - 1]]) % MOD;
		for (int j = 1; j <= n; j++)
			dp[j] = (0ll + dp[j + 1] + 1ll * j * dp[j] % MOD) % MOD;
	}
	printf("%lld\n", ans + 1);
	time_t FINISH = clock();
	cerr << "Execution time: " << (ld)(FINISH - START) / CLOCKS_PER_SEC * 1000.0 << " milliseconds.\n";
	return 0;
}
 

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:34:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int n; scanf("%d", &n);
         ~~~~~^~~~~~~~~~
teams.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", a + 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