Submission #385921

#	Time	Username	Problem	Language	Result	Execution time	Memory
385921		i_am_noob	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	683 ms	73452 KiB

tickets

#include<bits/stdc++.h>
#include "tickets.h"
using namespace std;

#define ll long long
//#define int ll
#define rep(n) rep1(i,n)
#define rep1(i,n) rep2(i,0,n)
#define rep2(i,a,b) for(int i=a; i<(b); ++i)
#define rep3(i,a,b) for(int i=a; i>=(b); --i)
#define pb push_back
#define sz(a) ((int)a.size())
#define all(a) a.begin(),a.end()
#define pii pair<int,int>
#define inf 0x3f3f3f3f3f3f3f3f
#define pow2(x) (1ll<<(x))

#ifdef i_am_noob
#define bug(...) cerr << "#" << __LINE__ << " " << #__VA_ARGS__ << "- ", _do(__VA_ARGS__)
template<typename T> void _do(T x){cerr << x << endl;}
template<typename T, typename ...S> void _do(T x, S... y){cerr << x << ", ";_do(y...);}
#else
#define bug(...) 49
#endif

const int maxn=1505;

ll find_maximum(int k, vector<vector<int>> a) {
    int n = sz(a);
    int m = sz(a[0]);
    vector<vector<int>> res;
    res.resize(n);
    rep(n) res[i].resize(m);
    rep(n) rep1(j,m) res[i][j]=-1;
    ll ans=0;
    int l[maxn],r[maxn];
    rep(n) l[i]=0,r[i]=m-1;
    pair<ll,int> b[maxn];
    rep1(j,k){
        rep(n) b[i].first=a[i][l[i]]+a[i][r[i]],b[i].second=i;
        sort(b,b+n);
        rep(n/2){
            ans-=a[b[i].second][l[b[i].second]];
            res[b[i].second][l[b[i].second]]=j;
            l[b[i].second]++;
        }
        rep(n/2){
            ans+=a[b[n/2+i].second][r[b[n/2+i].second]];
            res[b[n/2+i].second][r[b[n/2+i].second]]=j;
            r[b[n/2+i].second]--;
        }
    }
    allocate_tickets(res);
    return ans;
}

• Subtask 1: 11 / 11
• Subtask 2: 16 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10