Submission #966435

#	Time	Username	Problem	Language	Result	Execution time	Memory
966435		shadow_sami	Magic Tree (CEOI19_magictree)	C++17	11 / 100	79 ms	41536 KiB

magictree

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long int ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
typedef map<ll,ll> mi;
typedef long double ld;
typedef vector<ld> vd;
typedef vector<vector<ld>> vvd;
typedef pair<ld,ld> pd;
#define ff first
#define ss second
#define srt(a) sort(a.begin(),a.end());
#define fip(k, n) for (ll i = k; i < n; i++)
#define fjp(k, n) for (ll j = k; j < n; j++)
#define fin(k, n) for (ll i = k; i >= n; i--)
#define fjn(k, n) for (ll j = k; j >= n; j--)
#define fp(k, n, m) for (ll k = n; k < m; k++)
#define fn(k, n, m) for (ll k = n; k >= m; k--)
#define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update>
#define totalOne(n) __builtin_popcount(n)
#define backZero(n) __builtin_ctzll(n)
#define frontZero(n) __builtin_clzll(n)
#define fx(k) for ( auto x : k )
#define test ll t;cin >> t;while (t--)
#define nli "\n"

// ==========================(debug)============================================================================================== //

#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x <<" "; _printn(x); cerr << nli;
#else
#define debug(x)
#endif

void _printn(ll x){ cerr<<x<<" "; }
void _printn(int x){ cerr<<x<<" "; }
void _printn(ld x){ cerr<<x<<" "; }
void _printn(double x){ cerr<<x<<" "; }
void _printn(string x){ cerr<<x<<" "; }
void _printn(char x){ cerr<<x<<" "; }
void _printn(bool x){ cerr<<x<<" "; }
template<class T,class V>void _printn(pair<T,V> vv);
template<class T> void _printn(vector<T> vv);
template<class T> void _printn(set<T> vv);
template<class T,class V> void _printn(map<T,V> vv);
template<class T> void _printn(multiset<T> vv);
template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";}
template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; };
template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };

// ==========================(debug)============================================================================================== //

ll n,m,tp,tp2,res,cnt,sum,tptp,ans;
const ll mx = 5e5+5;
const ll mod = 1e9+7;

// ==========================(MOD)=============================================================================================== //

ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; }
ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; }
ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; }
ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; }
ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; }

// ==========================(MOD)=============================================================================================== //

bool f = false;
vi adj[mx];
ll d[mx];
ll w[mx];
ll sr;

typedef struct SEGMENT_TREE{
	vi arr;
	ll range;
	void init(ll k){
		range = log2(k);
		range = 1 << (range + 3);
		arr.resize(range);
		fip(0,range)
			arr[i] = -1e18;
		return;
	}
	ll query(ll ptr,ll l,ll r,ll st,ll en){
		if(l>=st && r<=en)
			return arr[ptr];
		if(l>en || r<st)
			return -1e18;
		ll mid = l + (r-l) / 2;
		return max(query(2*ptr,l,mid,st,en),query(2*ptr+1,mid+1,r,st,en));
	}
	void update(ll ptr,ll l,ll r,ll pos,ll val){
		if(l==r && l==pos){
			arr[ptr] = val;
			return;
		}
		if(l>pos || r<pos)
			return;
		ll mid = l + (r-l) / 2;
		update(2*ptr,l,mid,pos,val);
		update(2*ptr+1,mid+1,r,pos,val);
		arr[ptr] = max(arr[2*ptr],arr[2*ptr+1]);
		return;
	}
}SGT;

SGT st;

vector<pair<ll,pi>> v;
vector<pi> vv;
ll id[mx];
ll dp[mx];

int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    // #ifndef ONLINE_JUDGE
    //     freopen("input1.txt", "r", stdin);
    //     freopen("output1.txt", "w", stdout);
    //     freopen("error1.txt", "w", stderr);
    // #endif // ONLINE_JUDGE

        cin>>n>>m>>tp;
        fip(0,n+2){
        	adj[i].clear();
        	d[i] = -1;
        }
        fip(2,n+1){
        	cin>>sr;
        	adj[sr].push_back(i);
        }        
        fip(0,m){
        	cin>>res>>tp2>>tptp;        	
        	v.push_back({res,{tp2,tptp}});
        }        
        srt(v);
        reverse(v.begin(),v.end());
        tptp = v.size();
        // debug(v);
        fip(0,tptp)
        	vv.push_back({v[i].ss.ff,i});
        srt(vv);
        // debug(vv);
        fip(0,tptp)
        	id[vv[i].ss] = i+1;
        st.init(tptp+1);
        st.update(1,0,tptp,0,0);
        dp[0] = 0;
        ans = 0;
        fip(0,tptp){
        	dp[id[i]] = st.query(1,0,tptp,0,id[i]) + v[i].ss.ss;
        	ans = max(dp[id[i]],ans);
        	st.update(1,0,tptp,id[i],dp[id[i]]);
        }
        cout<<ans<<nli;
                
    cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
    return 0;
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 3
• Subtask 3: 11 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17