제출 #343131

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
343131		dxz05	"The Lyuboyn" code (IZhO19_lyuboyn)	C++14	34 / 100	869 ms	27496 KiB

lyuboyn

//#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

typedef long long ll;
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.00001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e6 + 4e4;
const int M = 4500;
const int L = 19;

int n, k, t, s;
bool flag[N];

vector<int> ans;
vector<int> good;

bool used[N];

void dfs(int v){
    if (ans.size() == (1 << n)) return;
    used[v] = true;
    ans.push_back(v);
    int cnt = 0;
    for (int x : good){
        if (ans.size() == (1 << n)) return;
        int u = x ^ v;
        if (!used[u]) dfs(u), cnt++;
    }

    if (cnt == 0 && (ans.size() != (1 << n) || !flag[s ^ v])){
        cout << -1;
        exit(0);
    }

}

bool check(vector<int> &v){
    if (ans.size() != (1 << n)) return false;

    for (int i = 1; i < v.size(); i++){
        if (!flag[v[i - 1] ^ v[i]]) return false;
    }
    return (t == 0 || flag[v[0] ^ v.back()]);
}

void solve(int TC) {
    cin >> n >> k >> t >> s;

    for (int mask = 0; mask < (1 << n); mask++){
        if (__builtin_popcount(mask) == k) good.push_back(mask), flag[mask] = true;
    }

    dfs(s);

    if (check(ans)){
        cout << ans.size() << endl;
        for (int x : ans){
            for (int i = n - 1; i >= 0; i--){
                cout << ((x & (1 << i)) > 0);
            }
            cout << endl;
        }
    } else cout << -1;

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false);

    bool llololcal = false;
#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    llololcal = true;
#endif

    int TC = 1;
    //cin >> TC;

    for (int test = 1; test <= TC; test++) {
        debug(test);
        solve(test);
    }

    if (llololcal) cerr << endl << "Time: " << getCurrentTime() * 1000 << " ms" << endl;

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

lyuboyn.cpp: In function 'void dfs(int)':
lyuboyn.cpp:48:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |     if (ans.size() == (1 << n)) return;
      |         ~~~~~~~~~~~^~~~~~~~~~~
lyuboyn.cpp:53:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   53 |         if (ans.size() == (1 << n)) return;
      |             ~~~~~~~~~~~^~~~~~~~~~~
lyuboyn.cpp:58:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   58 |     if (cnt == 0 && (ans.size() != (1 << n) || !flag[s ^ v])){
      |                      ~~~~~~~~~~~^~~~~~~~~~~
lyuboyn.cpp: In function 'bool check(std::vector<int>&)':
lyuboyn.cpp:66:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   66 |     if (ans.size() != (1 << n)) return false;
      |         ~~~~~~~~~~~^~~~~~~~~~~
lyuboyn.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for (int i = 1; i < v.size(); i++){
      |                     ~~^~~~~~~~~~
lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:18:20: warning: statement has no effect [-Wunused-value]
   18 | #define debug(...) 42
      |                    ^~
lyuboyn.cpp:110:9: note: in expansion of macro 'debug'
  110 |         debug(test);
      |         ^~~~~

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