제출 #685116

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
685116		vicious	선물상자 (IOI15_boxes)	C++17	100 / 100	561 ms	333048 KiB

boxes

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define si second
typedef pair<int,int> pi;
typedef tuple<int,int,int> ti;  
template<typename T> bool chmin(T &a, T b){return (b < a) ? a = b, 1 : 0;}
template<typename T> bool chmax(T &a, T b){return (b > a) ? a = b, 1 : 0;}
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head _H, Tail... _T) {cerr<<" "<<to_string(_H);debug_out(_T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
const int MAXN=1e7+10;
int n,k,l,a[MAXN];
ll dp[2][MAXN],ans=1e18;

long long delivery(int N, int K, int L, int p[]) {
    n=N,k=K,l=L;
    for (int i = 0; i < n; ++i) a[i+1]=p[i];
    for (int i = 1; i <= n; ++i) {
        if (i<k) dp[0][i]=2*a[i];
        else dp[0][i]=dp[0][i-k]+2*a[i];
    }
    for (int i = n; i >= 1; --i) {
        if (i>n-k) dp[1][i]=2*(l-a[i]);
        else dp[1][i]=dp[1][i+k]+2*(l-a[i]);
    }
    ans = min(dp[0][n],dp[1][1]);
    for (int i = 1; i < n; ++i) {
        chmin(ans, dp[0][i]+dp[1][i+1]);
    }
    for (int i = 0; i <= n-k; ++i) {
        chmin(ans, dp[0][i]+dp[1][i+k+1]+l);
    }
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30