Submission #99665

#	Time	Username	Problem	Language	Result	Execution time	Memory
99665		adlet	Calvinball championship (CEOI15_teams)	C++17	20 / 100	1084 ms	428 KiB

teams

#pragma GCC optimize("Ofast")
#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 = 1e9 + 7;
const int INF = 1e9;
const double PI = acos(-1.0);

vector < int > vec;

int n, a[20], cnt;

void rec(int i, int mx = 1) {
    if (i == n + 1) {
        ++cnt;
        for (int i = 0; i < vec.size(); ++i) {
            if (vec[i] != a[i + 1])
                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));
        vec.pop_back();
    }

}

int main() {
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
    }
    rec(1);
}
/**
clock() / (double)CLOCKS_PER_SEC < 1.9

*/

Compilation message (stderr)

teams.cpp: In function 'void rec(int, int)':
teams.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < vec.size(); ++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