Submission #712512

#	Time	Username	Problem	Language	Result	Execution time	Memory
712512		Username4132	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	1 ms	340 KiB

boxes

#include "boxes.h"
#include<iostream>
#include<vector>
using namespace std;
using ll = long long;
#define forn(i, n) for(int i=0; i<(int)n; ++i)

const int MAXN=10000010;
int le[MAXN], ri[MAXN], cnl=0, cnr=0;
ll dpl[MAXN], dpr[MAXN];

long long delivery(int N, int K, int L, int p[]) {

    forn(i, N){
        if(p[i]<(L>>1)) le[cnl++]=p[i];
        else ri[cnr++]=L-p[i];
    }

    forn(i, cnl){
        if(i<K) dpl[i]=le[i];
        else dpl[i]=dpl[i-K]+le[i];
    }
    forn(i, cnr){
        if(i<K) dpr[i]=ri[i];
        else dpr[i]=dpr[i-K]+ri[i];
    }

    ll ans = (dpl[cnl-1]+dpr[cnr-1])<<1;
    forn(i, K+1){
        ans = min(ans, (dpl[cnl-1-i] + dpr[cnr-1-K+i])<<1 + L);
    }

    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:30:59: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   30 |         ans = min(ans, (dpl[cnl-1-i] + dpr[cnr-1-K+i])<<1 + L);
      |                                                         ~~^~~

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