結果
問題 | No.2667 Constrained Permutation |
ユーザー | otera |
提出日時 | 2024-03-08 22:45:55 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,318 ms / 2,000 ms |
コード長 | 7,861 bytes |
コンパイル時間 | 2,217 ms |
コンパイル使用メモリ | 212,256 KB |
実行使用メモリ | 15,232 KB |
最終ジャッジ日時 | 2024-09-29 20:15:01 |
合計ジャッジ時間 | 18,704 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 1 ms
6,820 KB |
testcase_02 | AC | 3 ms
6,820 KB |
testcase_03 | AC | 3 ms
6,820 KB |
testcase_04 | AC | 4 ms
6,816 KB |
testcase_05 | AC | 3 ms
6,816 KB |
testcase_06 | AC | 4 ms
6,820 KB |
testcase_07 | AC | 2 ms
6,820 KB |
testcase_08 | AC | 4 ms
6,820 KB |
testcase_09 | AC | 4 ms
6,820 KB |
testcase_10 | AC | 3 ms
6,816 KB |
testcase_11 | AC | 4 ms
6,816 KB |
testcase_12 | AC | 318 ms
7,280 KB |
testcase_13 | AC | 11 ms
6,816 KB |
testcase_14 | AC | 1,091 ms
13,196 KB |
testcase_15 | AC | 554 ms
11,136 KB |
testcase_16 | AC | 269 ms
9,980 KB |
testcase_17 | AC | 73 ms
6,816 KB |
testcase_18 | AC | 1,318 ms
14,280 KB |
testcase_19 | AC | 1,171 ms
15,232 KB |
testcase_20 | AC | 1,267 ms
13,516 KB |
testcase_21 | AC | 519 ms
14,264 KB |
testcase_22 | AC | 469 ms
13,508 KB |
testcase_23 | AC | 498 ms
13,592 KB |
testcase_24 | AC | 434 ms
7,560 KB |
testcase_25 | AC | 894 ms
11,792 KB |
testcase_26 | AC | 1,213 ms
13,000 KB |
testcase_27 | AC | 996 ms
13,160 KB |
testcase_28 | AC | 68 ms
11,120 KB |
testcase_29 | AC | 65 ms
10,820 KB |
testcase_30 | AC | 71 ms
11,488 KB |
testcase_31 | AC | 44 ms
8,032 KB |
testcase_32 | AC | 11 ms
6,816 KB |
testcase_33 | AC | 430 ms
13,168 KB |
testcase_34 | AC | 216 ms
8,928 KB |
testcase_35 | AC | 249 ms
9,624 KB |
testcase_36 | AC | 247 ms
9,196 KB |
testcase_37 | AC | 261 ms
9,980 KB |
testcase_38 | AC | 312 ms
11,232 KB |
testcase_39 | AC | 5 ms
6,820 KB |
testcase_40 | AC | 189 ms
9,100 KB |
testcase_41 | AC | 336 ms
12,328 KB |
testcase_42 | AC | 279 ms
9,552 KB |
testcase_43 | AC | 426 ms
12,496 KB |
testcase_44 | AC | 395 ms
7,404 KB |
testcase_45 | AC | 12 ms
6,816 KB |
ソースコード
/** * author: otera * created: 03.08.2024 21:39:35 **/ // l_i - k < = p_i <= r_i - k // 値が小さい順にみると、区間スケジューリングみたいな感じか // つまり、各kに対して、\tilde{O}(n)で解ける // okなkは区間になるのでは? // 二分探索で上界、下界を求めたい? #include<bits/stdc++.h> namespace otera {} using namespace std; using namespace otera; struct io_setup { io_setup(int precision = 20) { ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(precision); } } io_setup_ {}; // #define int long long using ll = long long; using ld = long double; using ull = unsigned long long; using i128 = __int128_t; using u128 = __uint128_t; #define repa(i, n) for(int i = 0; i < (n); ++ i) #define repb(i, a, b) for(int i = (a); i < (b); ++ i) #define repc(i, a, b, c) for(int i = (a); i < (b); i += (c)) #define overload4(a, b, c, d, e, ...) e #define overload3(a, b, c, d, ...) d #define rep(...) overload4(__VA_ARGS__, repc, repb, repa)(__VA_ARGS__) #define rep1a(i, n) for(int i = 1; i <= (n); ++ i) #define rep1b(i, a, b) for(int i = (a); i <= (b); ++ i) #define rep1c(i, a, b, c) for(int i = (a); i <= (b); i += (c)) #define rep1(...) overload4(__VA_ARGS__, rep1c, rep1b, rep1a)(__VA_ARGS__) #define rev_repa(i, n) for(int i=(n)-1;i>=0;i--) #define rev_repb(i, a, b) for(int i=(b)-1;i>=(a);i--) #define rev_rep(...) overload3(__VA_ARGS__, rev_repb, rev_repa)(__VA_ARGS__) #define rev_rep1a(i, n) for(int i=(n);i>=1;i--) #define rev_rep1b(i, a, b) for(int i=(b);i>=(a);i--) #define rev_rep1(...) overload3(__VA_ARGS__, rev_rep1b, rev_rep1a)(__VA_ARGS__) #define for_subset(t, s) for(ll t = (s); t >= 0; t = (t == 0 ? -1 : (t - 1) & (s))) typedef pair<int, int> P; typedef pair<ll, ll> LP; #define pb push_back #define pf push_front #define ppb pop_back #define ppf pop_front #define eb emplace_back #define mkp make_pair #define mkt make_tuple #define fr first #define sc second #define all(c) std::begin(c), std::end(c) #define rall(c) std::rbegin(c), std::rend(c) #define lb(c, x) distance(std::begin(c), lower_bound(all(c), (x))) #define ub(c, x) distance(std::begin(c), upper_bound(all(c), (x))) #define Sort(a) sort(all(a)) #define Rev(a) reverse(all(a)) #define Uniq(a) sort(all(a));(a).erase(unique(all(a)),std::end(a)) #define si(c) (int)(c).size() inline ll popcnt(ull a){ return __builtin_popcountll(a); } #define kth_bit(x, k) ((x>>k)&1) #define unless(A) if(!(A)) #define elif else if ll modulo(ll n, ll d){ return (n % d + d) % d; }; ll intpow(ll a, ll b){ ll ans = 1; while(b){ if(b & 1) ans *= a; a *= a; b /= 2; } return ans; } ll intpow(ll a, ll b, ll m) {ll ans = 1; while(b){ if(b & 1) (ans *= a) %= m; (a *= a) %= m; b /= 2; } return ans; } template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } template <typename T> constexpr inline int pow_m1(T n) { return -(n & 1) | 1; } template <typename T> constexpr inline T fld(const T x, const T y) { return (x ^ y) >= 0 ? x / y : (x - (y + pow_m1(y >= 0))) / y; } template <typename T> constexpr inline T cld(const T x, const T y) { return (x ^ y) <= 0 ? x / y : (x + (y + pow_m1(y >= 0))) / y; } #define INT(...) int __VA_ARGS__;in(__VA_ARGS__) #define LL(...) ll __VA_ARGS__;in(__VA_ARGS__) #define ULL(...) ull __VA_ARGS__;in(__VA_ARGS__) #define STR(...) string __VA_ARGS__;in(__VA_ARGS__) #define CHR(...) char __VA_ARGS__;in(__VA_ARGS__) #define DBL(...) double __VA_ARGS__;in(__VA_ARGS__) #define LD(...) ld __VA_ARGS__;in(__VA_ARGS__) #define vec(type,name,...) vector<type>name(__VA_ARGS__) #define VEC(type,name,size) vector<type>name(size);in(name) #define vv(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__)) #define VV(type,name,h,w) vector<vector<type>>name(h,vector<type>(w));in(name) #define vvv(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__))) template <class T> using vc = vector<T>; template <class T> using vvc = vector<vc<T>>; template <class T> using vvvc = vector<vvc<T>>; template <class T> using vvvvc = vector<vvvc<T>>; template <class T> using pq = priority_queue<T>; template <class T> using pqg = priority_queue<T, vector<T>, greater<T>>; template <class T, class U> using umap = unordered_map<T, U>; template<class T> void scan(T& a){ cin >> a; } template<class T> void scan(vector<T>& a){ for(auto&& i : a) scan(i); } void in(){} template <class Head, class... Tail> void in(Head& head, Tail&... tail){ scan(head); in(tail...); } void print(){ cout << ' '; } template<class T> void print(const T& a){ cout << a; } template<class T> void print(const vector<T>& a){ if(a.empty()) return; print(a[0]); for(auto i = a.begin(); ++i != a.end(); ){ cout << ' '; print(*i); } } int out(){ cout << '\n'; return 0; } template<class T> int out(const T& t){ print(t); cout << '\n'; return 0; } template<class Head, class... Tail> int out(const Head& head, const Tail&... tail){ print(head); cout << ' '; out(tail...); return 0; } #define CHOOSE(a) CHOOSE2 a #define CHOOSE2(a0,a1,a2,a3,a4,x,...) x #define debug_1(x1) cout<<#x1<<": "<<x1<<endl #define debug_2(x1,x2) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<endl #define debug_3(x1,x2,x3) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<endl #define debug_4(x1,x2,x3,x4) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<endl #define debug_5(x1,x2,x3,x4,x5) cout<<#x1<<": "<<x1<<", "#x2<<": "<<x2<<", "#x3<<": "<<x3<<", "#x4<<": "<<x4<<", "#x5<<": "<<x5<<endl #ifdef DEBUG #define debug(...) CHOOSE((__VA_ARGS__,debug_5,debug_4,debug_3,debug_2,debug_1,~))(__VA_ARGS__) #define dump(...) { print(#__VA_ARGS__); print(":"); out(__VA_ARGS__); } #else #define debug(...) #define dump(...) #endif const int inf = 1e9 + 7; void solve() { INT(n); vc<int> l(n), r(n); rep(i, n) { in(l[i], r[i]); -- l[i]; } // [l[i], r[i]) auto check = [&](int k) -> int { pqg<P> pque; vvc<int> g(n); rep(i, n) { if(l[i] - k < 0) { pque.emplace(r[i] - k, i); } else if(l[i] - k < n) { g[l[i] - k].eb(i); } } rep(i, n) { for(int id: g[i]) { pque.emplace(r[id] - k, id); } if(pque.empty()) return 1; auto [val, id] = pque.top(); pque.pop(); unless(i < val) { return -1; } } return 0; }; int le = -inf, ri = inf; bool flag = 0; int ok = -1; assert(check(le) == 1); assert(check(ri) == -1); while(ri - le > 1) { int mid = (le + ri) / 2; int val = check(mid); if(val == 0) { flag = 1; ok = mid; break; } else if(val == 1) { le = mid; } else { ri = mid; } } if(check(le) == 0) { flag = 1; ok = le; } if(check(ri) == 0) { flag = 1; ok = ri; } if(!flag) { out(0); return; } int ple = le, pri = ri; int mi = -1, ma = -1; { le = ple, ri = ok; while(ri - le > 1) { int mid = (le + ri) / 2; if(check(mid) == 0) ri = mid; else le = mid; } mi = ri; } { le = ok, ri = pri; while(ri - le > 1) { int mid = (le + ri) / 2; if(check(mid) == 0) le = mid; else ri = mid; } ma = le; } int ans = ma - mi + 1; out(ans); } signed main() { int testcase = 1; // in(testcase); while(testcase--) solve(); return 0; }