제출 #761058

#제출 시각아이디문제언어결과실행 시간메모리
761058Red_Inside선물상자 (IOI15_boxes)C++17
0 / 100
1 ms468 KiB
#include "boxes.h" #include <bits/stdc++.h> //#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops") #define ll long long #define f first #define s second #define pb push_back #define mp make_pair #define o cout<<"BUG"<<endl; #define FOR(i, j, n) for(int j = i; j < n; ++j) #define forn(i, j, n) for(int j = i; j <= n; ++j) #define nfor(i, j, n) for(int j = n; j >= i; --j) #define all(v) v.begin(), v.end() #define ld long double #define ull unsigned long long using namespace std; const int maxn=188500+10,LOG=17,mod=1e9+7; int block = 200, timer = 0; const double eps = 1e-9; mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); #define IOS ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); #define bt(i) (1 << (i)) //#define int ll const int inf=2e9; #define y1 yy #define pii pair <int, int> vector <int> fi, se; ll solve(int K, int L) { int tek; tek = 0; ll S1 = 0; ll S2 = 0; ll ans = 0; for(auto i : fi) S1+=i; for(auto i : se) S2+=i; for(int i = (int)fi.size() - 1; i >= 0; --i) { if(tek < fi[i]) { tek += K; ans += 2*i; } tek -= fi[i]; } for(int i = (int)se.size() - 1; i >= 0; --i) { if(tek < se[i]) { tek += K; ans += 2*i; } tek -= se[i]; } ll ret = ans; ans = 0; for(int i = (int)fi.size() - 1; i >= 0; --i) { if(tek < fi[i]) { fi[i] -= tek; S1 -= tek; tek = 0; if(S1 < K) { break; } tek += K; ans += 2*i; } tek -= fi[i]; fi[i] = 0; } for(int i = (int)se.size() - 1; i >= 0; --i) { if(tek < se[i]) { se[i] -= tek; S2 -= tek; tek = 0; if(S2 < K) { break; } tek += K; ans += 2*i; } tek -= se[i]; se[i] = 0; } ret = min(ret, ans + L); return ret; } long long delivery(int N, int K, int L, int p[]) { ll ret = 0; N = 0; p[0] = 0; forn(1, i, L-1) { ret += p[i] / K * 2*min(i, L-i); p[i] %= K; N += p[i]; } fi.clear(); se.clear(); if(L % 2 == 1) { int mid = L / 2; forn(0, i, mid) { fi.pb(p[i]); } se.pb(0); nfor(mid+1, i, L-1) { se.pb(p[i]); } return solve(K, L) + ret; } else { int mid = L / 2; forn(0, i, mid-1) { fi.pb(p[i]); } se.pb(0); nfor(mid + 1, i, L-1) { se.pb(p[i]); } ll ans = inf; forn(0, i, p[mid]) { fi.pb(i); se.pb(p[mid]-i); ans = min(ans, solve(K, L)); fi.pop_back(); se.pop_back(); } return ans + ret; } }
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