제출 #1191103

#제출 시각아이디문제언어결과실행 시간메모리
1191103shadow_samiBoarding Passes (BOI22_passes)C++20
60 / 100
2097 ms16900 KiB
#include<bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace __gnu_pbds; using namespace std; typedef long long int ll; typedef vector<ll> vi; typedef vector<vector<ll>> vvi; typedef pair<ll,ll> pi; typedef map<ll,ll> mi; typedef long double ld; typedef vector<ld> vd; typedef vector<vector<ld>> vvd; typedef pair<ld,ld> pd; #define ff first #define ss second #define srt(a) sort(a.begin(),a.end()); #define fip(k, n) for (ll i = k; i < n; i++) #define fjp(k, n) for (ll j = k; j < n; j++) #define fin(k, n) for (ll i = k; i >= n; i--) #define fjn(k, n) for (ll j = k; j >= n; j--) #define fp(k, n, m) for (ll k = n; k < m; k++) #define fn(k, n, m) for (ll k = n; k >= m; k--) #define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update> #define totalOne(n) __builtin_popcount(n) #define backZero(n) __builtin_ctzll(n) #define frontZero(n) __builtin_clzll(n) #define fx(k) for ( auto x : k ) #define test ll t;cin >> t;while (t--) #define nli "\n" // ==========================(debug)============================================================================================== // #ifdef SAMI #define debug(x) cerr<<#x;cerr<<" ";_printn(x);cerr<<nli; #define debg() cerr<<nli; #else #define debug(x) #define debg() #endif void _printn(ll x){ cerr<<x<<" "; } void _printn(int x){ cerr<<x<<" "; } void _printn(ld x){ cerr<<x<<" "; } void _printn(double x){ cerr<<x<<" "; } void _printn(string x){ cerr<<x<<" "; } void _printn(char x){ cerr<<x<<" "; } void _printn(bool x){ cerr<<x<<" "; } template<class T,class V>void _printn(pair<T,V> vv); template<class T> void _printn(vector<T> vv); template<class T> void _printn(set<T> vv); template<class T,class V> void _printn(map<T,V> vv); template<class T> void _printn(multiset<T> vv); template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";} template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; }; template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; // ==========================(debug)============================================================================================== // ll n,m,tp,tp2,res,cnt,sum,tptp,ans; const ll mx = 5e5+5; const ll mod = 1e9+7; // ==========================(MOD)=============================================================================================== // ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; } ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; } ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; } ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; } ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; } // ==========================(MOD)=============================================================================================== // bool f = false; string s; bool mark[mx]; ld pref[mx]; ld suf[mx]; vi lis[mx]; ld dp[1<<16]; ll to[mx]; ld get(ld aa,ld bb){ ld rss = aa * (aa-1); rss += bb * (bb-1); return (rss/4.0); } int main(){ ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); #ifdef SAMI freopen("input1.txt", "r", stdin); freopen("output1.txt", "w", stdout); freopen("error1.txt", "w", stderr); #endif // ONLINE_JUDGE cin>>s; n = s.size(); set<char> st; fx(s) st.insert(x); tp = st.size(); fip(0,(1<<tp)) dp[i] = 1e18; dp[0] = 0; cnt = 0; fx(st){ to[cnt] = x-'A'; cnt++; } fip(0,n) lis[s[i]-'A'].push_back(i); cnt = 0; fip(1,1<<tp){ // v = {1,4,3,6,5}; fjp(0,tp){ if(i & (1<<j)) mark[to[j]] = 1; else mark[to[j]] = 0; } fjp(0,tp){ ld rs = 0; if(i & (1<<j)){ tp2 = i-(1<<j); ll x = to[j]; mark[x] = 0; cnt = 0; fip(0,n){ pref[i] = (s[i]-'A'==x?cnt:0ll) + (i?pref[i-1]:0); if(mark[s[i]-'A']) cnt++; } cnt = 0; suf[n] = 0; rs = 1e18; fin(n-1,0){ suf[i] = (s[i]-'A'==x?cnt:0ll) + suf[i+1]; if(mark[s[i]-'A']) cnt++; } cnt = 0; fip(0,n) if(s[i]-'A' == x) cnt++; rs = suf[lis[x][0]] + get(0,cnt); rs = min(rs,pref[lis[x][lis[x].size()-1]] + get(0,cnt)); fip(0,(ll)lis[x].size()-1) rs = min(rs,pref[lis[x][i]]+suf[lis[x][i+1]]+get(i+1,cnt-i-1)); mark[x] = 1; dp[i] = min(dp[i],dp[tp2]+rs); } } } tp = (1ll<<tp) - 1; cout<<setprecision(20)<<dp[tp]<<nli; cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n"; return 0; }
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