Submission #441615

#	Time	Username	Problem	Language	Result	Execution time	Memory
441615		julian33	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	9 ms	5048 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 dp[12][12][1<<11],n,k,l,pos[15];

ll make(int at,int rem,int mask){
    if(~dp[at][rem][mask])
        return dp[at][rem][mask];
    ll res=1e18;
    if(at!=n)
        res=make(n,k,mask)+min(l-pos[at],pos[at]);
    if(pos[at]){
        if(rem==1)
            return dp[at][rem][mask]=res;
        for(int i=0;i<n;i++){
            if(!(mask&(1<<i))){
                mina(res,make(i,rem-1,mask|(1<<i))+abs(pos[at]-pos[i]));
            }
        }
    } else{
        for(int i=0;i<n;i++){
            if(!(mask&(1<<i))){
                mina(res,make(i,k,mask|(1<<i))+abs(pos[at]-pos[i]));
            }
        }
    }
    return dp[at][rem][mask]=(res==1e18?0:res);
}

ll delivery(int N,int K,int L, int positions[]){
    n=N; k=K; l=L;
    for(int i=0;i<n;i++)
        pos[i]=positions[i];
    memset(dp,-1,sizeof(dp));
    return make(n,k,0);
}

Compilation message (stderr)

boxes.cpp: In function 'll make(int, int, int)':
boxes.cpp:64:18: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   64 |         res=make(n,k,mask)+min(l-pos[at],pos[at]);
      |                  ^
boxes.cpp:64:20: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   64 |         res=make(n,k,mask)+min(l-pos[at],pos[at]);
      |                    ^
boxes.cpp:76:33: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   76 |                 mina(res,make(i,k,mask|(1<<i))+abs(pos[at]-pos[i]));
      |                                 ^
boxes.cpp:80:31: warning: conversion from 'll' {aka 'long long int'} to 'double' may change value [-Wconversion]
   80 |     return dp[at][rem][mask]=(res==1e18?0:res);
      |                               ^~~
boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:88:17: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   88 |     return make(n,k,0);
      |                 ^
boxes.cpp:88:19: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   88 |     return make(n,k,0);
      |                   ^

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