Submission #888304

#	Time	Username	Problem	Language	Result	Execution time	Memory
888304		raul2008487	Table Tennis (info1cup20_tabletennis)	C++17	49 / 100	27 ms	6244 KiB

tabletennis

/// R
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define fi first
#define se second
#define all(v) v.begin(), v.end()
#define in insert
#define mpr make_pair
#define vl vector<ll>
#define endl '\n'
using namespace std;
const int sz = 2e5+5;
const ll inf = 1000000000000000;
//tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> rbt;a
/*struct DSU{
    vector<ll> e;
    void init(ll n){
        e.assign(n+1, -1);
    }
    ll base(ll x){
        if(e[x] < 0){
            return x;
        }
        return e[x] = base(e[x]);
    }
    bool unite(ll a, ll b){
        a = base(a);
        b = base(b);
        if(a == b){return false;}
        if(e[a] > e[b]){
            swap(a, b);
        }
        e[a] += e[b];
        e[b] = a;
        return true;
    }
};*/
ll n, k, m;
vl d, v(sz);
void print(ll bg, ll ed, ll pos){
    ll l = bg, r = ed, s1 = d[bg], s2 = d[ed];
    vl bad, res;
    while(l < r && pos <= k){
        if(s1 == s2){
            l++;
            r--;
        }
        else if(s1 < s2){
            l++;
            bad.pb(l);
            s1 += d[l];
        }
        else{
            bad.pb(r);
            r--;
            s2 += d[r];
        }
    }
    ll ptr = 0;
    for(int g = bg; g <= ed+1; g++){
        if(ptr < bad.size() && bad[ptr] == g){ptr++;continue;}
        res.pb(v[g]);
    }
    for(auto x: res){
        cout << x << ' ';
    }
    cout << endl;
}
bool check(ll bg, ll ed, ll pos){
    ll l = bg, r = ed, s1 = d[bg], s2 = d[ed];
    ll cnt = 1;
    if( l > r){return false;}
    while(l < r && pos <= k){
        if(s1 == s2){
            l++;
            r--;
            cnt++;
        }
        else if(s1 < s2){
            l++;
            pos++;
            s1 += d[l];
        }
        else{
            r--;
            pos++;
            s2 += d[r];
        }
    }
    return (cnt == (n/2) && pos == k);
}
void solve(){
    ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
    cin>>n>>k;
    m = n + k;
    for(i=0;i<m;i++){
        cin>>v[i];
    }
    for(i=1;i<m;i++){
        d.pb(v[i] - v[i-1]);
    }
    for(i=0;i<=k;i++){
        for(j=0;j<=k-i;j++){
            if(check(i, m - 2 - j, i + j)){
                print(i, m - 2 - j, i + j);
                return ;
            }
        }
    }
    assert(0);
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll t=1;
    //cin>>t;
    while(t--){
        solve();
    }
}
/*
6 3
1 2 3 6 7 9 10 12 14


1 3 6 7 10 12
*/

Compilation message (stderr)

tabletennis.cpp: In function 'void print(long long int, long long int, long long int)':
tabletennis.cpp:62:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         if(ptr < bad.size() && bad[ptr] == g){ptr++;continue;}
      |            ~~~~^~~~~~~~~~~~
tabletennis.cpp: In function 'void solve()':
tabletennis.cpp:94:14: warning: unused variable 'bg' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |              ^~
tabletennis.cpp:94:18: warning: unused variable 'ed' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                  ^~
tabletennis.cpp:94:22: warning: unused variable 'pt' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                      ^~
tabletennis.cpp:94:26: warning: unused variable 'w1' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                          ^~
tabletennis.cpp:94:30: warning: unused variable 'w2' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                              ^~
tabletennis.cpp:94:34: warning: unused variable 'cnt' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                                  ^~~
tabletennis.cpp:94:39: warning: unused variable 'l' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                                       ^
tabletennis.cpp:94:42: warning: unused variable 'r' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                                          ^
tabletennis.cpp:94:45: warning: unused variable 'cc' [-Wunused-variable]
   94 |     ll i, j, bg, ed, pt, w1, w2, cnt, l, r, cc;
      |                                             ^~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13