Submission #1124603

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124603		Zero_OP	NoM (RMI21_nom)	C++20	9 / 100	266 ms	440 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define rep(i, l, r) for(int i = (l); i < (r); ++i)
#define sz(v) (int)v.size()
#define dbg(x) "[" #x " = " << (x) << "]"
#define all(v) begin(v), end(v)
#define compact(v) v.erase(unique(all(v)), end(v))
#define file(name) if(fopen(name".inp", "r")){ freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }

template<typename T>
    bool minimize(T& a, const T& b){
        if(a > b){
            return a = b, true;
        }
        return false;
    }

template<typename T>
    bool maximize(T& a, const T& b){
        if(a < b){
            return a = b, true;
        }
        return false;
    }

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

using ll = long long;
using ld = long double;
using ull = unsigned long long;
using vi = vector<int>;
using vl = vector<ll>;

const int mod = 1e9 + 7;

int N, M;

namespace subtask1{
    bool check(){
        return N <= 5 && M <= 5;
    }

    void solve(){
        vector<int> perm(2 * N);
        iota(all(perm), 0);

        int ans = 0;
        do{
            vector<int> lst(N, -1);
            bool ok = true;
            for(int i = 0; i < 2 * N; ++i){
                int x = perm[i] % N;
                if(lst[x] == -1) lst[x] = i;
                else if(abs(lst[x] - i) % M == 0){
                    ok = false;
                    break;
                }
            }
            ans += ok;
        } while(next_permutation(all(perm)));
        cout << ans << '\n';
    }
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    file("A");

    cin >> N >> M;

    if(subtask1::check()) return subtask1::solve(), 0;

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:10:55: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | #define file(name) if(fopen(name".inp", "r")){ freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:71:5: note: in expansion of macro 'file'
   71 |     file("A");
      |     ^~~~
Main.cpp:10:88: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | #define file(name) if(fopen(name".inp", "r")){ freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:71:5: note: in expansion of macro 'file'
   71 |     file("A");
      |     ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 18
• Subtask 5: 0 / 48