Submission #125459

#	Time	Username	Problem	Language	Result	Execution time	Memory
125459		eriksuenderhauf	Calvinball championship (CEOI15_teams)	C++11	30 / 100	754 ms	4384 KiB

teams

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define mem(a,v) memset((a), (v), sizeof (a))
#define enl printf("\n")
#define case(t) printf("Case #%d: ", (t))
#define ni(n) scanf("%d", &(n))
#define nl(n) scanf("%I64d", &(n))
#define nai(a, n) for (int i = 0; i < (n); i++) ni(a[i])
#define nal(a, n) for (int i = 0; i < (n); i++) nl(a[i])
#define pri(n) printf("%d\n", (n))
#define prl(n) printf("%I64d\n", (n))
#define pii pair<int, int>
#define pil pair<int, long long>
#define pll pair<long long, long long>
#define vii vector<pii>
#define vil vector<pil>
#define vll vector<pll>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef cc_hash_table<int,int,hash<int>> ht;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> oset;
const double pi = acos(-1);
const int MOD = 1e6 + 7;
const int MAXN = 1e3 + 5;
const double eps = 1e-9;
int a[MAXN], dp[MAXN][MAXN];

int dfs(int len, int mx) {
	if (mx == 0) return 0;
	if (len == 0) return 1;
	if (dp[len][mx] != -1) return dp[len][mx];
	int ret = 0;
	for (int i = 1; i <= mx+1; i++)
		ret = (ret + dfs(len-1, max(mx, i)));
	return dp[len][mx] = ret;
}

int main() {
	int n; ni(n);
	for (int i = 0; i < n; i++)
		ni(a[i]);
	mem(dp, -1);
	int ans = 1, mx = 1;
	for (int i = 1; i < n; i++) {
		int tmp = ans;
		for (int j = 1; j < a[i]; j++)
			ans = (ans + dfs(n - i - 1, max(mx, j))) % MOD;
		mx = max(mx, a[i]);
	}
	printf("%d\n", ans);
    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:55:7: warning: unused variable 'tmp' [-Wunused-variable]
   int tmp = ans;
       ^~~
teams.cpp:9:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
teams.cpp:49:9: note: in expansion of macro 'ni'
  int n; ni(n);
         ^~
teams.cpp:9:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
teams.cpp:51:3: note: in expansion of macro 'ni'
   ni(a[i]);
   ^~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 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