Submission #1134935

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134935		8pete8	Petrol stations (CEOI24_stations)	C++20	55 / 100	129 ms	85380 KiB

Main

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<cassert>
#include<unordered_map>
#include <queue>
#include <cstdint>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include <iomanip>
#include<numeric>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define vi vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
#pragma GCC optimize ("03,unroll-lopps")
#define int long long
using namespace std;
const int mod=1e9+7,mxn=2e5+5,inf=1e18,minf=-1e18,lg=30;
//#undef int
int n,k,m,w,h,l;
void setIO(string name){		
	ios_base::sync_with_stdio(0); cin.tie(0);		
	freopen((name+".in").c_str(),"r",stdin);		
	freopen((name+".out").c_str(),"w",stdout);	
}
int ans[mxn+10];
vector<pii>adj[mxn+10];
vector<vector<int>>dp,dpu;
int sz[mxn+10];
void getsz(int cur,int p){sz[cur]=1;for(auto i:adj[cur])if(i.f!=p)getsz(i.f,cur),sz[cur]+=sz[i.f];}
void getdp(int cur,int p){
    dp[cur][0]++;
    for(auto i:adj[cur])if(i.f!=p){
        getdp(i.f,cur);
        for(int j=0;j<=k;j++){
            if(j+i.s<=k)dp[cur][j+i.s]+=dp[i.f][j];
            else{
                ans[i.f]+=(dp[i.f][j]*(n-sz[i.f]));
                dp[cur][i.s]+=dp[i.f][j];
            }
        }
    }
}
void getdpu(int cur,int p){
    vector<vector<int>>pref(adj[cur].size()+1,vector<int>(k+1,0)),suf(adj[cur].size()+1,vector<int>(k+1,0));
    int c=0;
    dpu[cur][0]++;
    for(auto i:adj[cur])if(i.f!=p){
        for(int j=0;j<=k;j++){
            if(j+i.s<=k)pref[c][j+i.s]+=dp[i.f][j];
            else pref[c][i.s]+=dp[i.f][j];
            if(c)pref[c][j]+=pref[c-1][j];
        }
        c++;
    }
    c=adj[cur].size()-1;
    if(p!=-1)c--;
    for(int i=adj[cur].size()-1;i>=0;i--)if(adj[cur][i].f!=p){
        for(int j=0;j<=k;j++){
            if(j+adj[cur][i].s<=k)suf[c][j+adj[cur][i].s]+=dp[adj[cur][i].f][j];
            else suf[c][adj[cur][i].s]+=dp[adj[cur][i].f][j];
            suf[c][j]+=suf[c+1][j];
        }
        c--;
    }
    c=0;
    for(auto i:adj[cur])if(i.f!=p){
        for(int j=0;j<=k;j++){
            if(j+i.s<=k){
                dpu[i.f][j+i.s]+=dpu[cur][j];
                if(c)dpu[i.f][j+i.s]+=pref[c-1][j];
                dpu[i.f][j+i.s]+=suf[c+1][j];
            }
            else{
                int sum=dpu[cur][j];
                if(c)sum+=pref[c-1][j];
                sum+=suf[c+1][j];
                dpu[i.f][i.s]+=sum;
                ans[cur]+=(sz[i.f]*sum);
            }
        }
        c++;
    }
    for(auto i:adj[cur])if(i.f!=p)getdpu(i.f,cur);
}
int32_t main(){
    fastio
    cin>>n>>k;
    dp.resize(n+1,vector<int>(k+1,0));
    dpu.resize(n+1,vector<int>(k+1,0));
    for(int i=0;i<n-1;i++){
        int a,b,c;cin>>a>>b>>c;
        adj[a].pb({b,c});
        adj[b].pb({a,c});
    }
    getsz(0,-1);
    getdp(0,-1);
    getdpu(0,-1);
    for(int i=0;i<n;i++)cout<<ans[i]<<'\n';
}
/*
dp(x,k) = cnt node A in subtree x with dist =k
dpu(x,k) =cnt node outside subtree x
*/

Compilation message (stderr)

Main.cpp:32:40: warning: bad option '-funroll-lopps' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize ("03,unroll-lopps")
      |                                        ^
Main.cpp:38:23: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   38 | void setIO(string name){
      |                       ^
Main.cpp:47:25: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   47 | void getsz(int cur,int p){sz[cur]=1;for(auto i:adj[cur])if(i.f!=p)getsz(i.f,cur),sz[cur]+=sz[i.f];}
      |                         ^
Main.cpp:48:25: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   48 | void getdp(int cur,int p){
      |                         ^
Main.cpp:61:26: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
   61 | void getdpu(int cur,int p){
      |                          ^
Main.cpp:103:14: warning: bad option '-funroll-lopps' to attribute 'optimize' [-Wattributes]
  103 | int32_t main(){
      |              ^
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((name+".in").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen((name+".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 18 / 18
• Subtask 2: 8 / 8
• Subtask 3: 0 / 10
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 0 / 35