結果
| 問題 |
No.2740 Old Maid
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-01-22 17:13:50 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 49 ms / 2,000 ms |
| コード長 | 2,915 bytes |
| コンパイル時間 | 1,327 ms |
| コンパイル使用メモリ | 114,172 KB |
| 実行使用メモリ | 18,308 KB |
| 最終ジャッジ日時 | 2025-01-22 17:13:59 |
| 合計ジャッジ時間 | 9,482 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 62 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:72:42: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
72 | for (int i = 1; i < n + 1; i++) scanf("%d", w + i), id[w[i]] = i, ne[i] = i + 1, pre[i] = i - 1;
| ~~~~~^~~~~~~~~~~~~
ソースコード
#include <iostream>
#include <sstream>
#include <iomanip>
#include <cstring>
#include <string>
#include <algorithm>
#include <cmath>
#include <map>
#include <set>
#include <vector>
#include <queue>
#include <unordered_set>
#include <unordered_map>
#include <bitset>
#include <ctime>
#include <assert.h>
#include <deque>
#include <list>
#include <stack>
using namespace std;
#define is_mul_overflow(a, b) \
((b != 0) && (a > LLONG_MAX / b || a < LLONG_MIN / b))
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef pair<long long , long long> pll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef pair<int, pii> piii;
typedef pair<int, long long > pil;
typedef pair<long long, pii> plii;
typedef pair<double, int> pdi;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ull, ull> puu;
typedef long double ld;
const int N = 2000086, MOD = 998244353, INF = 0x3f3f3f3f, MID = 333;
const long double EPS = 1e-8;
int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
// int dx[8] = {1, 1, 0, -1, -1, -1, 0, 1}, dy[8] = {0, 1, 1, 1, 0, -1, -1, -1};
// int dx[8] = {2, 1, -1, -2, -2, -1, 1, 2}, dy[8] = {1, 2, 2, 1, -1, -2, -2, -1};
int n, m, cnt;
int w[N];
vector<ll> num;
ll res;
ll lowbit(ll x) { return x & -x; }
ll lcm(ll a, ll b) { return a / __gcd(a, b) * b; }
inline double rand(double l, double r) { return (double)rand() / RAND_MAX * (r - l) + l; }
inline ll qmi(ll a, ll b, ll c) { ll res = 1; while (b) { if (b & 1) res = res * a % c; a = a * a % c; b >>= 1; } return res; }
inline ll qmi(ll a, ll b) { ll res = 1; while (b) { if (b & 1) res *= a; a *= a; b >>= 1; } return res; }
inline double qmi(double a, ll b) { double res = 1; while (b) { if (b & 1) res *= a; a *= a; b >>= 1; } return res; }
// inline ll C(ll a, ll b) { if (a < b) return 0; if (b > a - b) b = a - b; ll res = 1; for (ll i = 1, j = a; i <= b; i++, j--) { res = res * (j % MOD) % MOD; res = res * qmi(i, MOD - 2, MOD) % MOD; } return res; }
inline ll C(ll a, ll b, int* c) { if (a < b) return 0; ll res = 1; for (ll j = a, i = 1; i < b + 1; i++, j--) res *= j; for (ll j = a, i = 1; i < b + 1; i++, j--) res /= i; return res; }
inline int find_(int x) { return lower_bound(num.begin(), num.end(), x) - num.begin(); }
int q[N], ne[N], id[N], pre[N];
bool st[N];
void erase(int x, int y) {
assert(x && y);
int p = pre[x], t = ne[y];
if (p) ne[p] = t;
if (t) pre[t] = p;
}
int main() {
cin >> n;
for (int i = 1; i < n + 1; i++) scanf("%d", w + i), id[w[i]] = i, ne[i] = i + 1, pre[i] = i - 1;
ne[n] = 0;
int now = 1;
while (now <= n) {
if (st[now] || !ne[id[now]]) { now++; continue; }
int x = id[now], y = ne[id[now]];
st[w[x]] = st[w[y]] = 1;
erase(x, y);
q[++cnt] = w[x];
q[++cnt] = w[y];
now++;
}
for (int i = 1; i < n + 1; i++) printf("%d ", q[i]);
return 0;
}