제출 #993320

#제출 시각아이디문제언어결과실행 시간메모리
993320Mr_Husanboy선물상자 (IOI15_boxes)C++17
100 / 100
481 ms293632 KiB
#include "boxes.h" #include<bits/stdc++.h> using namespace std; #define ll long long const ll infl = 1e18; #ifdef LOCAL #include "debugger.cpp" #else #define debug(...) #endif const int maxn = 1e7 + 1; ll lef[maxn], rig[maxn]; long long delivery(int n, int k, int mx, int p[]) { for(int i = 0; i < n; i ++){ lef[i] = min(mx, 2 * p[i]); if(i - k >= 0) lef[i] += lef[i - k]; } ll ans = lef[n - 1]; for(int i = n - 1; i >= 0; i --){ rig[i] = min(mx, 2 * (mx - p[i])); if(i + k <= n - 1) rig[i] += rig[i + k]; if(i + 1 <= n - 1){ ans = min(ans, lef[i] + rig[i + 1]); } } ans = min(ans, rig[0]); return ans; }
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