Submission #1084669

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084669		SulA	Calvinball championship (CEOI15_teams)	C++17	30 / 100	1080 ms	1112 KiB

teams

#include <bits/stdc++.h>
using namespace std;

const int MOD = 1e6 + 7;

vector<int> a;
int cnt = 0;
void backtrack(int i = 0, int mx = 0, bool eq = true) {
    if (i == a.size()) {
        (cnt += 1) %= MOD;
        if (eq) {
            cout << cnt;
            exit(0);
        }
        return;
    }
    for (int val = 1; val <= mx + 1; val++) {
        backtrack(i + 1, max(mx, val), eq && val == a[i]);
    }
}

int main() {
    int n; cin >> n;
    a.resize(n);
    for (int& x : a) cin >> x;
    backtrack();
}

Compilation message (stderr)

teams.cpp: In function 'void backtrack(int, int, bool)':
teams.cpp:9:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     if (i == a.size()) {
      |         ~~^~~~~~~~~~~

• 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