結果
問題 |
No.1523 +/- Tree
|
ユーザー |
![]() |
提出日時 | 2021-05-28 22:23:45 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,233 bytes |
コンパイル時間 | 1,268 ms |
コンパイル使用メモリ | 119,604 KB |
最終ジャッジ日時 | 2025-01-21 20:09:27 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 36 WA * 4 RE * 4 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:91:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 91 | scanf("%d%d", &N, &K); | ~~~~~^~~~~~~~~~~~~~~~
ソースコード
#include <cmath> #include <cstdio> #include <cstdlib> #include <cstring> #include <algorithm> #include <bitset> #include <complex> #include <iostream> #include <map> #include <numeric> #include <queue> #include <set> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <vector> #include <cassert> #include <functional> using ll = long long; using namespace std; template<typename A, typename B> bool chmin(A &a, const B b) { if (a <= b) return false; a = b; return true; } template<typename A, typename B> bool chmax(A &a, const B b) { if (a >= b) return false; a = b; return true; } #ifndef LOCAL #define debug(...) ; #else #define debug(...) cerr << __LINE__ << " : " << #__VA_ARGS__ << " = " << _tostr(__VA_ARGS__) << endl; template<typename T> ostream &operator<<(ostream &out, const vector<T> &v); template<typename T1, typename T2> ostream &operator<<(ostream &out, const pair<T1, T2> &p) { out << "{" << p.first << ", " << p.second << "}"; return out; } template<typename T> ostream &operator<<(ostream &out, const vector<T> &v) { out << '{'; for (const T &item : v) out << item << ", "; out << "\b\b}"; return out; } void _tostr_rec(ostringstream &oss) { oss << "\b\b \b"; } template<typename Head, typename... Tail> void _tostr_rec(ostringstream &oss, Head &&head, Tail &&...tail) { oss << head << ", "; _tostr_rec(oss, forward<Tail>(tail)...); } template<typename... T> string _tostr(T &&...args) { ostringstream oss; int size = sizeof...(args); if (size > 1) oss << "{"; _tostr_rec(oss, forward<T>(args)...); if (size > 1) oss << "}"; return oss.str(); } #endif constexpr int mod = 1'000'000'007; //1e9+7(prime number) constexpr int INF = 1'000'000'000; //1e9 constexpr ll LLINF = 2'000'000'000'000'000'000LL; //2e18 constexpr int SIZE = 200010; int main() { int N, K; scanf("%d%d", &N, &K); if (N - 1 == K || K == 1) { puts("No"); return 0; } //? if (K == 2 && N % 2 == 1) { assert(false); puts("No"); return 0; } vector<pair<pair<int, int>, int>> ans; if (K % 2 == 0) { // 奇数本 for (int i = 0; (i + 1) * 2 <= N - 2; i++) { ans.push_back({{i * 2 + 0, i * 2 + 1}, 10000 - 2}); ans.push_back({{i * 2 + 1, i * 2 + 2}, -10000}); } if ((N - 1) % 2) { ans.push_back({{N - 2, N - 1}, 10000 - 2}); } else { ans.push_back({{N - 3, N - 2}, 10000 - 2}); ans.push_back({{1, N - 1}, 10000 - 2}); } } else { for (int i = 0; (i + 1) * 3 <= N - 2; i++) { ans.push_back({{i * 3 + 0, i * 3 + 1}, 10000 - 2}); ans.push_back({{i * 3 + 1, i * 3 + 2}, -10000}); ans.push_back({{i * 3 + 2, i * 3 + 3}, 0}); } if ((N - 1) % 3 == 1) { ans.push_back({{N - 2, N - 1}, 10000 - 2}); } else if ((N - 1) % 3 == 2) { ans.push_back({{N - 3, N - 2}, 10000 - 2}); ans.push_back({{1, N - 1}, 10000 - 2}); } else { ans.push_back({{N - 4, N - 3}, 10000 - 2}); ans.push_back({{N - 3, N - 2}, -10000}); ans.push_back({{1, N - 1}, 10000 - 2}); } } puts("Yes"); for (auto e : ans) { printf("%d %d %d\n", e.first.first + 1, e.first.second + 1, e.second); } return 0; }