Submission #996859

#	Time	Username	Problem	Language	Result	Execution time	Memory
996859		modwwe	Team Contest (JOI22_team)	C++17	100 / 100	474 ms	25632 KiB

team

#include<bits/stdc++.h>
//#define int long long
//#define ll long long
#define down cout<<'\n';
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
const int inf=1e9;
void phongbeo();
const int mod2=1e9+7;
const int  mod1=998244353;
struct icd
{
    int a,b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a,b,c;
};
struct id
{
    int a,b,c,d;
};
struct ie
{
    int a,b,c, d,e,f;

};
int n,m,s1,s2,s4,s3,sf,k,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l;
int  i,s10,s12;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
    //fin(task),fou(task);
#endif
    NHP
    /// cin>>s1;
    // modwwe
    phongbeo(),down
    checktime
}
int bit[450001];
void reset()
{
    for(int i=1; i<=n*3; i++) bit[i]=3*n+1;
}
void upd(int x,int y)
{
    for(x; x; x-=x&-x) bit[x]=min(bit[x],y);
}
int get(int x)
{
    int ss=3*n+1;
    for(x; x<=n*3; x+=x&-x)ss=min(ss,bit[x]);
    return ss;
}
bool cmp(id a,id b)
{
    if(a.a==b.a)return a.c>b.c;
    return a.a<b.a;
}
int d[150001];
id a[150001];
id b[150001];
vector<int> v;
vector<int> v2[450001];
bool cmp2(id a,id b)
{
    if(a.c==b.c)return a.a<b.a;
    return a.c>b.c;
}
void solve()
{
    /// muc dich ham solve :
    /// sort theo ac
    /// aa dung cuoi
    /// ab dung giua
    /// ta co goi b1 b2 b3 la thu tu
    /// b1.a<b2.a<b3.a
///b1.c>b2.c>b3.c
///b1.b<b2.b>b3.b
    sort(a+1,a+1+n,cmp);
     for(int i=1;i<=n;i++)
    v2[a[i].c].clear();
    reset();
    for(int i=1; i<=n; i++)
    {
        l=a[i].c+1;
        r=n*3;
        s2=-1;
        while(l<=r)
        {
            int mid=l+r>>1;
            if(get(mid)<a[i].b)l=mid+1,s2=mid;
            else r=mid-1;
        }
        if(s2!=-1)d[a[i].d]=v[s2-1]+v[a[i].b-1],
        v2[s2].pb({a[i].d});
                else  d[a[i].d]=-1e9,upd(a[i].c,a[i].b);
    }
    sort(a+1,a+1+n,cmp2);
    reset();
    for(int i=n; i>=1; --i)
    {  //cout<<a[i].c,down
                 upd(a[i].a,a[i].b);

        if(a[i-1].c!=a[i].c)
        for(auto x:v2[a[i-1].c]){
        l=b[x].a+1;
        r=n*3;
        s2=-1;
        while(l<=r)
        {
            int mid=l+r>>1;
            if(get(mid)<b[x].b)
                l=mid+1,s2=mid;
            else r=mid-1;
        }
        if(s2!=-1)
        {
            s3=max(s3,d[x]+v[s2-1]);
        }
        }
    }
/// cot chon thu 2 se la cot 2 va co cot 1 lon thu h2

}
void phongbeo()
{
    cin>>n;
    reset();
    for(int i=1; i<=n; i++)
        cin>>a[i].a>>a[i].b>>a[i].c,a[i].d=i,
                                        v.pb(a[i].a),
                                        v.pb(a[i].b),
                                        v.pb(a[i].c);
    sort(v.begin(),v.end());
    for(int i=1; i<=n; i++)
        a[i].a=lower_bound(v.begin(),v.end(),a[i].a)-v.begin()+1,
            a[i].b=lower_bound(v.begin(),v.end(),a[i].b)-v.begin()+1,
                a[i].c=lower_bound(v.begin(),v.end(),a[i].c)-v.begin()+1;
    s3=-1;
    for(int i=1;i<=n;i++)
 b[i]=a[i];
   solve();
   for(int i=1; i<=n; i++)
        swap(a[i].a,a[i].b),
        swap(b[i].a,b[i].b);
    solve();
    for(int i=1; i<=n; i++)
        swap(a[i].a,a[i].b),
        swap(b[i].a,b[i].b);
    for(int i=1; i<=n; i++)
        swap(a[i].c,a[i].b),
        swap(b[i].c,b[i].b);
    solve();
    cout<<s3;
}

Compilation message (stderr)

team.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   44 | main()
      | ^~~~
team.cpp: In function 'void upd(int, int)':
team.cpp:62:9: warning: statement has no effect [-Wunused-value]
   62 |     for(x; x; x-=x&-x) bit[x]=min(bit[x],y);
      |         ^
team.cpp: In function 'int get(int)':
team.cpp:67:9: warning: statement has no effect [-Wunused-value]
   67 |     for(x; x<=n*3; x+=x&-x)ss=min(ss,bit[x]);
      |         ^
team.cpp: In function 'void solve()':
team.cpp:106:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  106 |             int mid=l+r>>1;
      |                     ~^~
team.cpp:127:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  127 |             int mid=l+r>>1;
      |                     ~^~

• 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