Submission #99671

#	Time	Username	Problem	Language	Result	Execution time	Memory
99671		adlet	Calvinball championship (CEOI15_teams)	C++17	20 / 100	1076 ms	384 KiB

teams

#include <bits/stdc++.h>

#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define ios ios_base::sync_with_stdio(0), cin.tie(0)

using namespace std;

typedef long long ll;

const int N = 1e5 + 5;
const int mod = 1e6 + 7;
const int INF = 1e9;
const double PI = acos(-1.0);

vector < int > vec;

int n, a[20], cnt;

ll res = 1;

void rec(int i, int mx = 1, int ok = -1) {
    if (i == n + 1) {
        ++cnt;
        if (cnt >= mod)
            cnt -= mod;
//        for (int i : vec)
//            cout << i << " ";
//        cout << "\n";
        if (!ok)
            return;
        cout << cnt;
        exit(0);
    }
    for (int j = 1; j <= min(i, mx + 1); ++j) {
        vec.push_back(j);
        rec(i + 1, max(j, mx), (j != a[i]) ? 0 : ok);
        vec.pop_back();
    }

}

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; ++i) {
        scanf("%d", a + i);
        res = (res * 1ll * a[i]) % mod;
    }
//    if (n <= 14) {
        rec(1);
        return 0;
//    }
}
/**
clock() / (double)CLOCKS_PER_SEC < 1.9

*/

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
teams.cpp:45:14: 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: 0 / 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