Submission #770096

#	Time	Username	Problem	Language	Result	Execution time	Memory
770096		MarwenElarbi	Paths (RMI21_paths)	C++17	19 / 100	1039 ms	18008 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const ll MOD = 1e9+7;
const int nax = 2e5+5;
const int MAX_VAL = 1e6;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
int parent[nax];
vii adj[nax];
vii cur[nax];
ll res=0;
int dis;
bool test=false;
ll mx=0;
void dfs(int x,int p)
{
    for(auto u:cur[x])
    {
        if (u.fi==p) continue;
        parent[u.fi]=x;
        res+=u.se;
        //cout <<x<<" "<<u.fi<<" "<<u.se<<endl;
        if (mx<res)
        {
            mx=res;
            dis=u.fi;
        }
        dfs(u.fi,x);
        res-=u.se;
    }
}
bool search(int x,int p)
{
    for(int u=0;u<cur[x].size();u++)
    {
        if (cur[x][u].fi==p) continue;
        if (cur[x][u].fi==dis){
            cur[x][u].se=0;
            return true;
        }
        if (search(cur[x][u].fi,x)){
            cur[x][u].se=0;
            //cout << x<<" "<<cur[x][u].fi<<" "<<cur[x][u].se<<endl;
            return true;
        } 
    }
    return false;
}
int main(){
    optimise;
    /*#ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif*/
    //setIO("hopscotch");
    int n,k;
    cin>>n>>k;
    for (int i = 0; i < n-1; ++i)
    {
        int x,y,z;
        cin>>x>>y>>z;
        x--;y--;
        adj[x].pb({y,z});
        adj[y].pb({x,z});
    }
    ll sum=0;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < n; ++j)
        {
            cur[j].clear();
        }
        sum=0;
        parent[i]=i;
        for (int j = 0; j < n; ++j)
        {
            for (int q = 0; q < adj[j].size(); ++q)
            {
                cur[j].pb({adj[j][q]});
            }
        }
        for (int j = 0; j < k; ++j)
        {
            mx=0;
            res=0;
            dfs(i,-1);
            //cout <<mx<<" "<<dis<<endl;
            sum+=mx;
            search(i,-1);
        }
        cout <<sum<<endl;
    }
}

Compilation message (stderr)

Main.cpp: In function 'bool search(int, int)':
Main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(int u=0;u<cur[x].size();u++)
      |                 ~^~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:105:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |             for (int q = 0; q < adj[j].size(); ++q)
      |                             ~~^~~~~~~~~~~~~~~
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 11 / 11
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 12
• Subtask 6: 0 / 32