結果
| 問題 |
No.1523 +/- Tree
|
| コンテスト | |
| ユーザー |
goodbaton
|
| 提出日時 | 2021-05-28 22:18:25 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,214 bytes |
| コンパイル時間 | 1,080 ms |
| コンパイル使用メモリ | 118,580 KB |
| 最終ジャッジ日時 | 2025-01-21 20:07:58 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 40 WA * 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) {
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;
}
goodbaton