Submission #441608

#	Time	Username	Problem	Language	Result	Execution time	Memory
441608		julian33	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	2093 ms	204 KiB

boxes

#include <bits/stdc++.h>
 
using namespace std;
 
#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cerr<<vars<<" = ";
    string delim="";
    (...,(cerr<<delim<<values,delim=", "));
    cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif
 
#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);}
 
// ll delivery(int N, int K, int L, int positions[]){
//     ll ans=0;
//     vector<int> pos;
//     for(int i=0;i<N;i++){
//         if(positions[i])
//             pos.pb(positions[i]);
//     }
//     int n=sz(pos);
//     vector<ll> pref(n),suff(n);
//     for(int i=0;i<n;i++){
//         if(i<K){
//             pref[i]=min(2*pos[i],L);
//         } else{
//             pref[i]=pref[i/K*K-1]+min(2*pos[i],L);
//         }
//     }
//     for(int i=n-1;i>=0;i--){
//         if(n-i-1<K){
//             suff[i]=min(2*(L-pos[i]),L);
//         } else{
//             suff[i]=suff[n-1-(n-i-1)/K*K+1]+min(2*(L-pos[i]),L);
//         }
//     }
//     ans=min(pref[n-1],suff[0]);
//     for(int i=0;i<n-1;i++)
//         mina(ans,pref[i]+suff[i+1]);
//     return ans;
// }

ll delivery(int N,int K,int L, int positions[]){
    ll ans=1e18;
    vector<int> Positions;
    for(int i=0;i<N;i++){
        if(positions[i]!=0)
            Positions.pb(positions[i]);
    }
    int n=sz(Positions);
    vector<int> pos(n);
    for(int i=0;i<n;i++){
        pos[n-i-1]=1;
        sort(pos.begin(),pos.end());
        do{
            if(pos.back()!=1){
                continue;
            }
            vector<ll> pref(n),suff(n);
            int pre=-1;
            ll cur=0;
            for(int j=0;j<n;j++){
                if(j)
                    pref[j]=pref[j-1];
                if(pos[j]){
                    if(j-pre>K){
                        cur=1e18;
                        break;
                    }
                    pref[j]+=min(L,2*Positions[j]);
                    pre=j;
                }
            }
            if(cur==1e18)
                continue;
            for(int j=n-1;j>=0;j--){
                if(j!=n-1)
                    suff[j]=suff[j+1];
                if(pos[j])
                    suff[j]+=min(L,2*(L-Positions[i]));
            }
            cur=min(suff[0],pref[n-1]);
            for(int i=0;i<n-1;i++)
                mina(cur,pref[i]+suff[i+1]);
            mina(ans,cur);
        } while(next_permutation(pos.begin(),pos.end()));
    }
    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:88:16: warning: conversion from 'll' {aka 'long long int'} to 'double' may change value [-Wconversion]
   88 |             if(cur==1e18)
      |                ^~~
boxes.cpp:97:21: warning: declaration of 'i' shadows a previous local [-Wshadow]
   97 |             for(int i=0;i<n-1;i++)
      |                     ^
boxes.cpp:66:13: note: shadowed declaration is here
   66 |     for(int i=0;i<n;i++){
      |             ^

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