Submission #1087108

#	Time	Username	Problem	Language	Result	Execution time	Memory
1087108		modwwe	Road Closures (APIO21_roads)	C++17	24 / 100	2083 ms	16732 KiB

roads

#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
#define int2 long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#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".ans","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while(c<'0'||c>'9')
    {
        c=getchar_unlocked();
    }
    while(c>='0'&&c<='9')
    {
        x=(x<<1)+(x<<3)+c-'0';
        c=getchar_unlocked();
    }
    return x;
}

void phongbeo();
const int inf=1e9;
const int mod2=1e9+9;
const int  mod1=998244353;
struct icd
{
    long double a;
    int 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;

};
int2  n,m,s1,s2,s4,s3,sf,k,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,s33,dem3,dem4,l,r,mid,l2,r2,center;
int  i,s10,s12;
int kk;
int el=29;

int2 a[100001];
int2 b[100001];
vector<ib> v[100001];
vector<int2> v2;
void dfs(int x,int y)
{
    for(auto f:v[x])
    {
        if(f.a!=y)
        {
            a[f.a]=f.b;
            b[f.a]=f.b;
            dfs(f.a,x) ;
        }
    }
}
void dfs2(int x,int y)
{
    for(auto f:v[x])
    {
        if(f.a!=y)
        {
            dfs2(f.a,x);
        }
    }
    for(auto f:v[x])
    {
        if(f.a!=y)
        {
            v2.pb(a[f.a]);
            a[f.a]=b[f.a];
        }
    }
    sort(v2.begin(),v2.end());
    s5=0;
 s3=v[x].size();
    for(int i=1; i<=s3-k; ++i)
    {
        s4+=v2[i-1];
        s5=v2[i-1];
    }
    s6=max(s3-k+1,1ll);
     for(int i=s6;i<=v2.size();i++)
     {
         if(v2[i-1]>=0) break;
          s4+=v2[i-1];
     }
        v2.clear();
 if(s5>0)
    a[x]-=s5;
}
vector<long long > vv;
vector<long long> minimum_closure_costs(int N,vector<int> U,vector<int> V,vector<int> W)
{
    n=N;
    for(int i=1; i<n; i++)
    {
        //cin>>l>>r>>s2;
        l=U[i-1];
        r=V[i-1];
        s2=W[i-1];
        l++;
        r++;
        v[l].pb({r,s2});
        v[r].pb({l,s2});
        s4+=s2;
    }
   dfs(1,0);
   for(int i=0; i<n; i++ )
    {
        if(i!=0)
            k=i, dfs2(1,0);
vv.pb(s4);
         s4=0;
    }
     return vv;
}
/*
main()
 {
      freopen("test.inp","r",stdin);
      freopen("test.ans","w",stdout);
      int n;
      cin>>n;
    vector<int> a1,a2,a3;
       for(int i=1;i<=n;i++)
       {
            int l,r,s2;
             cin>>l>>r>>s2;
              a1.pb(l);
              a2.pb(r);
              a3.pb(s2);
       }
        vector<int2> ve=minimum_closure_costs(n,a1,a2,a3);
         for(auto x:ve)
             cout<<x<<"\n";
 }*/
/**
5
1 2 1
1 3 4
1 4 3
3 5 2
*/

Compilation message (stderr)

roads.cpp: In function 'void dfs2(int, int)':
roads.cpp:109:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |      for(int i=s6;i<=v2.size();i++)
      |                   ~^~~~~~~~~~~
roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:130:18: warning: narrowing conversion of 'r' from 'long long int' to 'int' [-Wnarrowing]
  130 |         v[l].pb({r,s2});
      |                  ^
roads.cpp:130:20: warning: narrowing conversion of 's2' from 'long long int' to 'int' [-Wnarrowing]
  130 |         v[l].pb({r,s2});
      |                    ^~
roads.cpp:131:18: warning: narrowing conversion of 'l' from 'long long int' to 'int' [-Wnarrowing]
  131 |         v[r].pb({l,s2});
      |                  ^
roads.cpp:131:20: warning: narrowing conversion of 's2' from 'long long int' to 'int' [-Wnarrowing]
  131 |         v[r].pb({l,s2});
      |                    ^~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 14 / 14
• Subtask 4: 10 / 10
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 22