結果

問題 No.2519 Coins in Array
ユーザー tokusakurai
提出日時 2023-10-27 22:13:58
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 105 ms / 2,000 ms
コード長 5,551 bytes
コンパイル時間 2,385 ms
コンパイル使用メモリ 200,740 KB
最終ジャッジ日時 2025-02-17 15:10:15
ジャッジサーバーID
(参考情報)
judge4 / judge5
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ファイルパターン 結果
sample AC * 4
other AC * 37
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define per(i, n) for (int i = (n)-1; i >= 0; i--)
#define rep2(i, l, r) for (int i = (l); i < (r); i++)
#define per2(i, l, r) for (int i = (r)-1; i >= (l); i--)
#define each(e, v) for (auto &e : v)
#define MM << " " <<
#define pb push_back
#define eb emplace_back
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
template <typename T>
using minheap = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using maxheap = priority_queue<T>;
template <typename T>
bool chmax(T &x, const T &y) {
return (x < y) ? (x = y, true) : false;
}
template <typename T>
bool chmin(T &x, const T &y) {
return (x > y) ? (x = y, true) : false;
}
template <typename T>
int flg(T x, int i) {
return (x >> i) & 1;
}
int pct(int x) { return __builtin_popcount(x); }
int pct(ll x) { return __builtin_popcountll(x); }
int topbit(int x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }
int topbit(ll x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }
int botbit(int x) { return (x == 0 ? -1 : __builtin_ctz(x)); }
int botbit(ll x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }
template <typename T>
void print(const vector<T> &v, T x = 0) {
int n = v.size();
for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' ');
if (v.empty()) cout << '\n';
}
template <typename T>
void printn(const vector<T> &v, T x = 0) {
int n = v.size();
for (int i = 0; i < n; i++) cout << v[i] + x << '\n';
}
template <typename T>
int lb(const vector<T> &v, T x) {
return lower_bound(begin(v), end(v), x) - begin(v);
}
template <typename T>
int ub(const vector<T> &v, T x) {
return upper_bound(begin(v), end(v), x) - begin(v);
}
template <typename T>
void rearrange(vector<T> &v) {
sort(begin(v), end(v));
v.erase(unique(begin(v), end(v)), end(v));
}
template <typename T>
vector<int> id_sort(const vector<T> &v, bool greater = false) {
int n = v.size();
vector<int> ret(n);
iota(begin(ret), end(ret), 0);
sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; });
return ret;
}
template <typename T>
void reorder(vector<T> &a, const vector<int> &ord) {
int n = a.size();
vector<T> b(n);
for (int i = 0; i < n; i++) b[i] = a[ord[i]];
swap(a, b);
}
template <typename T>
T floor(T x, T y) {
assert(y != 0);
if (y < 0) x = -x, y = -y;
return (x >= 0 ? x / y : (x - y + 1) / y);
}
template <typename T>
T ceil(T x, T y) {
assert(y != 0);
if (y < 0) x = -x, y = -y;
return (x >= 0 ? (x + y - 1) / y : x / y);
}
template <typename S, typename T>
pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) {
return make_pair(p.first + q.first, p.second + q.second);
}
template <typename S, typename T>
pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) {
return make_pair(p.first - q.first, p.second - q.second);
}
template <typename S, typename T>
istream &operator>>(istream &is, pair<S, T> &p) {
S a;
T b;
is >> a >> b;
p = make_pair(a, b);
return is;
}
template <typename S, typename T>
ostream &operator<<(ostream &os, const pair<S, T> &p) {
return os << p.first << ' ' << p.second;
}
struct io_setup {
io_setup() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout << fixed << setprecision(15);
cerr << fixed << setprecision(15);
}
} io_setup;
constexpr int inf = (1 << 30) - 1;
constexpr ll INF = (1LL << 60) - 1;
// constexpr int MOD = 1000000007;
constexpr int MOD = 998244353;
void solve() {
int N;
cin >> N;
vector<int> a(N);
rep(i, N) {
cin >> a[i];
// if (a[i] == 1) {
// cout << 0 << '\n';
// return;
// }
}
auto get = [&](ll x, ll y) {
ll g = gcd(x, y);
if (g >= 2) return 0LL;
if (x == 0 || y == 0) return 0LL;
return (x - 1) * (y - 1);
};
auto ans = [&](int i, int j) { cout << i + 1 MM j + 1 << '\n'; };
if (N >= 4) {
vector<int> odd, even;
rep(i, N) {
(a[i] & 1 ? odd : even).eb(i); //
}
cout << 0 << '\n';
if (sz(even) >= 2) {
ans(even[0], even[1]);
rep(i, N - 2) ans(N - 3 - i, N - 2 - i);
} else if (sz(odd) >= 4) {
ans(odd[2], odd[3]);
ans(odd[0], odd[1]);
rep(i, N - 3) ans(N - 4 - i, N - 3 - i);
} else {
assert(sz(odd) == 3 && sz(even) == 1);
ans(odd[1], odd[2]);
int p = even[0];
rep2(i, 1, 3) {
if (odd[i] < even[0]) p--;
}
ans(p, N - 2);
ans(0, 1);
}
return;
}
if (N == 2) {
cout << get(a[0], a[1]) << '\n';
ans(0, 1);
return;
}
if (N == 3) {
ll mi = INF;
int id = -1;
rep(i, N) {
int j = (i + 1) % 3, k = (i + 2) % 3;
ll x = get(a[j], a[k]);
ll y = get(a[i], x);
if (chmin(mi, y)) id = i;
}
cout << mi << '\n';
int i = id;
int j = (i + 1) % 3, k = (i + 2) % 3;
ans(j, k);
ans(0, 1);
return;
}
}
int main() {
int T = 1;
// cin >> T;
while (T--) solve();
}
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