제출 #1124534

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1124534		HNa_seawjing	Petrol stations (CEOI24_stations)	C++20	26 / 100	57 ms	31300 KiB

Main

#include <bits/stdc++.h>
//code
#define fl(i,x,y,z) for(int i=x;i<=y;i=i+z)
#define fn(i,x,y,z) for(int i=x;i>=y;i=i-z)
#define rep(i,x,y) for(int i=x;i<y;i=i+1)
#define all(v) v.begin(),v.end()
#define pb emplace_back
#define tle cout<<"tle"<<endl
#define edl cout<<"\n"
#define el "\n"
#define getbit(x,i) ((x>>i)&1)
#define bitcnt __builtin_popcount
//ham
#define pii pair<int,int>
#define fi first
#define se second
#define ll long long
#define ld long double
#define inf 0x3f3f3f3f
//#define int long long
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int maxn=1e6+5;
int n,k;
int a[maxn];
vector <pii> e[maxn];
ll res[maxn];
int sz[maxn];
int D=0,lmax=0;
void inp()
{
    cin>>n>>k;
    fl(i,1,n-1,1)
    {
        int u,v,l; cin>>u>>v>>l;
        e[u].pb(v,l);
        e[v].pb(u,l);
        lmax=max(lmax,l);
    }
    rep(i,0,n) D=max(D,(int)e[i].size());
}
void sub12DFS(int u,int par)
{
    sz[u]=1;
    for (auto it: e[u])
    {
        int v=it.fi,l=it.se;
        if (v==par) continue;
        sub12DFS(v,u);
        sz[u]+=sz[v];
    }
}
void sub1reDFS(int u,int par,int w)
{
    for (auto it: e[u])
    {
        int v=it.fi,l=it.se;
        if (v==par) continue;
        if (w-l<0)
        {
            res[u]+=sz[v];
            sub1reDFS(v,u,k-l);
        }
        else sub1reDFS(v,u,w-l);
    }
}
void sub1()
{
    rep(i,0,n)
    {
        sub12DFS(i,i);
        sub1reDFS(i,i,k);
    }
    rep(i,0,n) cout<< res[i]<<el;
}

void sub2()
{
    int id;
    rep(i,0,n) if ((int)e[i].size()==1) id=i;
    sub12DFS(id,id);
    rep(i,0,n)
    {
        int x=n-sz[i],y=sz[i]-1;
        cout<< 1ll*(x/k)*y+ 1ll*(y/k)*x<<el;
    }
}

void sol()
{
    if (n<=1000) sub1();
    else if (D<=2 && lmax==1) sub2();
}
signed main()
{
    #define name "station"
    if (fopen(name".inp", "r"))
    {
        freopen(name".inp", "r", stdin);
        freopen(name".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    inp();
    sol();
    return 0;
}
/*   /\_/\
    ( ._. )
    / >V< \
*/

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:118:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |         freopen(name".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:119:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  119 |         freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 18 / 18
• Subtask 2: 8 / 8
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