Submission #1050169

#	Time	Username	Problem	Language	Result	Execution time	Memory
1050169		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	448 ms	47616 KiB

art

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace std;
#define all(x) (x).begin(), (x).end()
#define f first
#define s second  
#define int long long 
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define pb push_back
#define fast ios::sync_with_stdio(false);cin.tie(0); cout.tie(0)
int mod = 100000000;
typedef __gnu_pbds::tree<int, __gnu_pbds::null_type, less<int>, __gnu_pbds::rb_tree_tag, __gnu_pbds::tree_order_statistics_node_update> ordered_set;
const int N=1e6+150;
// int mind[N];
int d,n;
vector<int> t;
void init (int nn){
    d=nn;
	t.assign (d, 0);
}
int sum (int r){
	int result = 0;
	for (; r >= 0; r = (r & (r+1)) - 1)
		result += t[r];
	return result;
}

void inc (int i, int delta){
	for (; i < d; i = (i | (i+1)))
		t[i] += delta;
}

int sum (int l, int r){
	return sum (r) - sum (l-1);
}
int ans=0,sze=0,k;
vector<int>sz;
// vector<int>cnt;
vector<int>used;
vector<vector<int>>g;
void precalc(int v,int p){
    sz[v]=1;
    for(auto k:g[v]){
        if(k!=p and !used[k]){
            precalc(k,v);
            sz[v]+=sz[k];
        }
    }
    sze=max(sz[v],sze);
}
int centroid(int v,int p){
    for(auto k:g[v]){
        if(k!=p and sz[k]>sze/2 and !used[k]){
            return centroid(k,v);
        }
    }
    return v;
}
void dfs(int v,int p,int len){
    if(len>=d){
        return;
    }
    // cout<<v<<' '<<sum(k-len-1)<<" "<<sum(d-len)<<" "<<len<<' '<<sum(k-len,d-len)<<'\n';
    ans+=sum(k-len,d-len-1);
    for(auto to:g[v]){
        if(to!=p and !used[to]){
            dfs(to,v,len+1);
        }
    }
}
void update(int v,int p,int len){
    if(len>=d){
        return;
    }
    //cout<<k<<" "<<v<<" "<<len<<"\n";
   inc(len,1);
    //cout<<k<<" "<<v<<" "<<len<<" "<<cnt[len]<<"\n";
    for(auto to:g[v]){
        if(to!=p and !used[to]){
            update(to,v,len+1);
        }
    }
}
int h;
void cent(int v){
    sze=0;
    precalc(v,h);
    if(sze<=k)
        return;
    v=centroid(v,h);
    //cout<<v<<" ";
    inc(0,1);
    used[v]=1;
    // cout<<t[0]<<'\n';
    for(auto to:g[v]){
        if(to!=h and !used[to]){
            dfs(to,v,1);
            update(to,v,1);
        }
    }
    for(int i=0;i<d;i++){
        t[i]=0;
    }
    // cout<<sum(1,d)<<"\n";
    for(auto to:g[v]){
        if(to!=h and !used[to]){
            h=v;
            cent(to);
        }
    }
}
void solve(){
    int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
    cin>>n;
    map<int,int>man;
    vector<pair<int,int>>v;
    for(int i=0;i<n;i++){
        cin>>e>>f;
        man[e]+=f;
    }
    e=0;
    f=0;
    for(auto k:man){
        v.pb({k.f,k.s});
    }
    n=v.size();
    vector<int>p1(n+1,0);
    vector<int>p2(n+1,0);
    int sum=0;
    for(int i=1;i<=n;i++){
        p1[i]=v[i-1].f-sum;
        sum+=v[i-1].s;
        // cout<<p1[i]<<" ";
    }
    cout<<'\n';
    sum=0;
    for(int i=1;i<=n;i++){
        sum+=v[i-1].s;
        p2[i]=sum-v[i-1].f;
        // cout<<p2[i]<<" ";
    }
    cout<<'\n';
    for(int i=1;i<=n;i++){
        e=max(p1[i],e);
        a=max(a,p2[i]+e);
    }
    cout<<a<<" ";
}

signed main(){
    ios::sync_with_stdio(0); 
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // precalc();
    // cin >> t;
    while(t--) {
        solve();
    }
}

Compilation message (stderr)

art.cpp: In function 'void solve()':
art.cpp:115:9: warning: unused variable 'm' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |         ^
art.cpp:115:11: warning: unused variable 'x' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |           ^
art.cpp:115:13: warning: unused variable 'q' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |             ^
art.cpp:115:15: warning: unused variable 'b' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |               ^
art.cpp:115:19: warning: unused variable 'c' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |                   ^
art.cpp:115:36: warning: unused variable 'z' [-Wunused-variable]
  115 |     int m,x,q,b=2,c=20,e=0,f=0,a=0,z;
      |                                    ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50