제출 #1089569

#제출 시각아이디문제언어결과실행 시간메모리
1089569Tymond Martian DNA (BOI18_dna)C++17
100 / 100
39 ms15700 KiB
#include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; #define fi first #define se second #define vi vector<int> #define vll vector<long long> #define pii pair<int, int> #define pll pair<long long, long long> #define pb push_back #define mp make_pair #define eb emplace_back #define all(x) (x).begin(), (x).end() #define sz(x) (int)(x).size() mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count()); inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);} inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);} #ifdef DEBUG auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";} auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";} #define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X) #else #define debug(...){} #endif struct custom_hash { static uint64_t splitmix64(uint64_t x) { x += 0x9e3779b97f4a7c15; x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; x = (x ^ (x >> 27)) * 0x94d049bb133111eb; return x ^ (x >> 31); } size_t operator()(uint64_t x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); return splitmix64(x + FIXED_RANDOM); } }; const int MAXN = 2e5 + 7; vi pos[MAXN]; int mn[MAXN]; int a[MAXN]; int c[MAXN]; int wsk[MAXN]; int n, k, r; int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> n >> k >> r; for(int i = 1; i <= n; i++){ cin >> a[i]; pos[a[i]].pb(i); } for(int i = 1; i <= r; i++){ int x; cin >> x; cin >> mn[x]; } int mx = 1; for(int i = 0; i < k; i++){ if(sz(pos[i]) < mn[i]){ cout << "impossible\n"; return 0; } if(mn[i] == 0){ continue; } wsk[i] = mn[i]; c[i] = sz(pos[i]); mx = max(mx, pos[i][mn[i] - 1]); } int ans = n; for(int i = 1; i <= n; i++){ ans = min(ans, mx - i + 1); if(mn[a[i]] > 0){ if(wsk[a[i]] >= sz(pos[a[i]])){ break; } mx = max(mx, pos[a[i]][wsk[a[i]]]); wsk[a[i]]++; } } cout << ans << '\n'; return 0; }
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