Submission #781951

#	Time	Username	Problem	Language	Result	Execution time	Memory
781951		Dymo	Team Contest (JOI22_team)	C++14	100 / 100	107 ms	17100 KiB

team

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

#define ll long long
#define pll pair<ll,ll>
#define ff first
#define ss second
#define endl "\n"
#define pb push_back
#define F(i,a,b) for(ll i=a;i<=b;i++)

const ll maxn=3e5+10 ;
const ll base=3e18;
const ll mod= 1e9+7 ;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

/// have medal in APIO
/// goal 2/8

ll n;
pair<ll,pll> a[maxn];
set<pll> st;
set<pll> st1;
ll mx=-1;
void add(ll x,ll y)
{

    vector<pll> vt;
    vt.clear();

    auto it=st1.upper_bound(make_pair(x,-base));
    while (it!=st1.end()&&(*it).ss<=y)
    {
        vt.pb(*it);
        it++;
    }
    for (auto p:vt) st1.erase(p);
    it=st1.upper_bound(make_pair(x,base));
    if (it==st1.begin())
    {
        st1.insert(make_pair(x,y));
    }
    else
    {
        it--;
        if ((*it).ss<y) st1.insert(make_pair(x,y));
    }
}
/*
4
5 6 1
7 5 1
5 5 2
4 7 6
*/
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen("test.inp","r"))
    {
        freopen("test.inp","r",stdin);
        freopen("test.out","w",stdout);
    }
    cin>> n;
    for (int i=1; i<=n; i++)
    {
        cin>> a[i].ff>> a[i].ss.ff>>a[i].ss.ss;
    }
    sort(a+1,a+n+1);
    ll ans=-1;
    for (int i=1; i<=n; i++)
    {
        ll j=i;
        while (j<=n&&a[j].ff==a[i].ff)
            j++ ;
        j--;
        auto it=st1.upper_bound(make_pair(mx,base));
        if (it!=st1.begin())
        {
            it--;
            ll vals=(*it).ss;
            for (int t=i;t<=j;t++)
            {
                if (a[t].ss.ff<mx&&a[t].ss.ss<vals)
                {
                    ans=max(ans,mx+vals+a[t].ff);
                }
            }
        }
        for (int t=i;t<=j;t++)
        {
            ll x=a[t].ss.ff;
            ll y=a[t].ss.ss;
            add(x+1,y);
            auto it=st1.upper_bound(make_pair(x,base));
            bool chk=false;
            if (it!=st1.begin())
            {
                it--;
                if ((*it).ss>y)
                {
                    chk=true;
                    mx=max(mx,x);
                }
            }
        }
        i=j;
    }
    cout <<ans<<endl;
}

Compilation message (stderr)

team.cpp: In function 'int main()':
team.cpp:99:18: warning: variable 'chk' set but not used [-Wunused-but-set-variable]
   99 |             bool chk=false;
      |                  ^~~
team.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen("test.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
team.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("test.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 27 / 27