Submission #861094

#TimeUsernameProblemLanguageResultExecution timeMemory
861094Alfraganus"The Lyuboyn" code (IZhO19_lyuboyn)C++14
52 / 100
73 ms35280 KiB
#include <bits/stdc++.h> using namespace std; #define endl '\n' #define fs first #define ss second #define str string #define all(a) a.begin(), a.end() #define print(a) \ for (auto x : a) \ cout << x << ' '; \ cout << endl; #define each(x, a) for (auto x : a) vector<int> ans; vector<bool> used; int n, k, t, sx = 0; bool good(int s1, int s2){ int ans = 0; while(s1 > 0 or s2 > 0){ ans += (s1 % 2 != s2 % 2); s1 /= 2; s2 /= 2; } return ans == k; } bool dfs(int node, int step){ if(step == (1 << n) - 1){ if(t == 0){ ans.push_back(node); return true; } if(good(sx, node)) ans.push_back(node); else return false; return true; } used[node] = 1; if(k == 1){ for (int i = 0; i < n; i++) { if (!used[node ^ (1 << i)] and dfs(node ^ (1 << i), step + 1)) { ans.push_back(node); return true; } } } else if(k == 2){ for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { if (!used[(node ^ (1 << i)) ^ (1 << j)] and dfs((node ^ (1 << i)) ^ (1 << j), step + 1)) { ans.push_back(node); return true; } } } } else if(k == 3){ for(int i = 0; i < n; i ++){ for(int j = i + 1; j < n; j ++){ for(int x = j + 1; x < n; x ++){ if (!used[((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)] and dfs(((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x), step + 1)) { ans.push_back(node); return true; } } } } } else if (k == 4) { for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { for (int x = j + 1; x < n; x++) { for(int i1 = x + 1; i1 < n; i1 ++){ if (!used[(((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)] and dfs((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1), step + 1)) { ans.push_back(node); return true; } } } } } } else if(k == 5){ for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { for (int x = j + 1; x < n; x++) { for (int i1 = x + 1; i1 < n; i1++) { for(int i2 = i1 + 1; i2 < n; i2 ++){ if (!used[((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)] and dfs(((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2), step + 1)) { ans.push_back(node); return true; } } } } } } } else if (k == 6) { for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { for (int x = j + 1; x < n; x++) { for (int i1 = x + 1; i1 < n; i1++) { for (int i2 = i1 + 1; i2 < n; i2++) { for(int i3 = i2 + 1; i3 < n; i3 ++){ if (!used[(((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3)] and dfs((((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3), step + 1)) { ans.push_back(node); return true; } } } } } } } } else if(k == 7){ for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { for (int x = j + 1; x < n; x++) { for (int i1 = x + 1; i1 < n; i1++) { for (int i2 = i1 + 1; i2 < n; i2++) { for (int i3 = i2 + 1; i3 < n; i3++) { for(int i4 = i3 + 1; i4 < n; i4 ++){ if (!used[((((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3)) ^ (1 << i4)] and dfs(((((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3)) ^ (1 << i4), step + 1)) { ans.push_back(node); return true; } } } } } } } } } else if (k == 8) { for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { for (int x = j + 1; x < n; x++) { for (int i1 = x + 1; i1 < n; i1++) { for (int i2 = i1 + 1; i2 < n; i2++) { for (int i3 = i2 + 1; i3 < n; i3++) { for (int i4 = i3 + 1; i4 < n; i4++) { for(int i5 = i4 + 1; i5 < n; i5 ++){ if (!used[(((((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3)) ^ (1 << i4)) ^ (1 << i5)] and dfs((((((((node ^ (1 << i)) ^ (1 << j)) ^ (1 << x)) ^ (1 << i1)) ^ (1 << i2)) ^ (1 << i3)) ^ (1 << i4)) ^ (1 << i5), step + 1)) { ans.push_back(node); return true; } } } } } } } } } } used[node] = 0; return false; } void solve(){ cin >> n >> k >> t; str s; cin >> s; for(int i = s.size() - 1; i >= 0; i --){ if(s[i] == '1'){ sx += (1 << (s.size() - 1 - i)); } } if(k % 2 == 0){ cout << -1; return; } used.resize((1 << n)); if(dfs(sx, 0)){ cout << (1 << n) << endl; reverse(all(ans)); for(int i = 0; i < ans.size(); i ++){ str s = ""; for(int j = 0; j < n; j ++){ if(ans[i] % 2 == 0) s += '0'; else s += '1'; ans[i] >>= 1; } reverse(all(s)); cout << s << endl; } } else{ cout << -1; } } signed main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); int t = 1; // cin >> t; while (t--) { solve(); cout << endl; } }

Compilation message (stderr)

lyuboyn.cpp: In function 'void solve()':
lyuboyn.cpp:222:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  222 |         for(int i = 0; i < ans.size(); i ++){
      |                        ~~^~~~~~~~~~~~
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