제출 #140000

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
140000		TAMREF	선물상자 (IOI15_boxes)	C++11	10 / 100	8 ms	380 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll *ds, *de;

ll delivery(int N, int K, int L, int p[]) {
    int s = 0, e = N - 1, k = K;
    while(s <= e && p[s] == 0) ++s;
    ds = new ll[N+1];
    de = new ll[N+1];
    memset(ds,0,sizeof(ds));
    memset(de,0,sizeof(de));
    if(s > e) return 0;
    ll t = LLONG_MAX;
    int si = s;
    e = s;
    de[N] = 0;
    for(int i = N; i--;){
        de[i] = L - p[i];
        if(i + k < N) de[i] += de[i+k];
    }
    t = 2ll * de[si];
    for(; s < N; s++){
        ds[s] = p[s];
        if(s-k >= si) ds[s] += ds[s-k];
        for(e = s; e < N; e++) t = min(t, 2ll * (ds[s] + de[e+1]) + ll(e-s+k-1)/k * L);
    }
    //for(int i = 0; i <= N; i++) cout << ds[i] << ' '; cout << endl;
    //for(int i = 0; i <= N; i++) cout << de[i] << ' '; cout << endl;
    return t;
}

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:13:23: warning: argument to 'sizeof' in 'void* memset(void*, int, size_t)' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
     memset(ds,0,sizeof(ds));
                       ^
boxes.cpp:14:23: warning: argument to 'sizeof' in 'void* memset(void*, int, size_t)' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess]
     memset(de,0,sizeof(de));
                       ^

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30