제출 #440748

#제출 시각아이디문제언어결과실행 시간메모리
440748arwaeystoamnegPort Facility (JOI17_port_facility)C++17
100 / 100
1200 ms83308 KiB
// EXPLOSION! #define _CRT_SECURE_NO_WARNINGS #include<bits/stdc++.h> #include<unordered_set> #include<unordered_map> #include<chrono> using namespace std; typedef pair<int, int> pii; typedef long long ll; typedef pair<ll, ll> pll; typedef long double ld; typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pair<int, int>> vpi; typedef vector<pair<ll, ll>> vpll; #define FOR(i,a,b) for (int i = (a); i < (b); ++i) #define F0R(i,a) FOR(i,0,a) #define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i) #define R0F(i,a) ROF(i,0,a) #define trav(a,x) for (auto& a: x) #define pb push_back #define mp make_pair #define rsz resize #define sz(x) int(x.size()) #define all(x) x.begin(),x.end() #define f first #define s second #define cont continue #define endl '\n' //#define ednl '\n' #define test int testc;cin>>testc;while(testc--) #define pr(a, b) trav(x,a)cerr << x << b; cerr << endl; #define message cout << "Hello World" << endl; const int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 }; // for every grid problem!! const ll linf = 4000000000000000000LL; const ll inf = 1000000007;//998244353 void pv(vi a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vll a) { trav(x, a)cout << x << " "; cout << endl; }void pv(vector<vi>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); cout << endl; } }void pv(vector<vll>a) { F0R(i, sz(a)) { cout << i << endl; pv(a[i]); }cout << endl; }void pv(vector<string>a) { trav(x, a)cout << x << endl; cout << endl; } void setIO(string s) { ios_base::sync_with_stdio(0); cin.tie(0); #ifdef arwaeystoamneg if (sz(s)) { freopen((s + ".in").c_str(), "r", stdin); if (s != "test1") freopen((s + ".out").c_str(), "w", stdout); } #endif } int n; vpi a; vi link; int find(int i) { return i == link[i] ? i : link[i] = find(link[i]); } void unite(int i, int j) { link[find(i)] = find(j); } void merge(int i, int j) { // connect i and j -> i means not j and j means not i ( like 2 - sat ) unite(i, j + n); unite(i + n, j); if (find(i) == find(i + n) || find(j) == find(j + n)) { cout << 0 << endl; exit(0); } } int main() { setIO("test1"); cin >> n; a.rsz(n); trav(x, a)cin >> x.f >> x.s; sort(all(a)); link.rsz(2 * n); iota(all(link), 0); map<int, int>todo; F0R(i, n) { // find the range of segments intersecting the current range auto L = todo.lower_bound(a[i].f); auto R = todo.upper_bound(a[i].s); if (R != todo.begin()) { auto R1 = R; R1--; while (L != R) { merge(i, L->s); // if the current one's link node is the same as the one at the end, all of them in between must have the same linke node. if (find(R1->s) == find(L->s))break; L++; } } todo.insert({ a[i].s,i }); } ll ans = 1; F0R(i, n) { if (find(i) == i)ans = (ans * 2) % inf; } cout << ans << endl; }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...