Submission #948382

#	Time	Username	Problem	Language	Result	Execution time	Memory
948382		GrindMachine	Traffic (CEOI11_tra)	C++17	0 / 100	465 ms	46012 KiB

tra

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 3e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<pii> adj[N];
vector<bool> vis(N);

void dfs1(int u){
    vis[u] = 1;
    for(auto [v,t] : adj[u]){
        if(vis[v] or t == 2) conts;
        dfs1(v);
    }
}

vector<int> mn_reach(N,inf1), mx_reach(N,-inf1);

void dfs2(int u, int id){
    vis[u] = 1;
    amin(mn_reach[u],id);
    for(auto [v,t] : adj[u]){
        if(vis[v] or t == 1) conts;
        dfs2(v,id);
    }
}

void dfs3(int u, int id){
    vis[u] = 1;
    amax(mx_reach[u],id);
    for(auto [v,t] : adj[u]){
        if(vis[v] or t == 1) conts;
        dfs3(v,id);
    }
}

void solve(int test_case)
{
    int n,m,A,B; cin >> n >> m >> A >> B;
    vector<pii> a(n+5);
    rep1(i,n) cin >> a[i].ff >> a[i].ss;

    rep1(i,m){
        int u,v,t; cin >> u >> v >> t;
        if(t == 1){
            adj[u].pb({v,1}), adj[v].pb({u,2});
        }
        else{
            adj[u].pb({v,3}), adj[v].pb({u,3});
        }
    }

    rep1(i,n){
        if(!vis[i] and a[i].ff == 0){
            dfs1(i);
        }
    }

    vector<pii> right_good;

    rep1(i,n){
        if(vis[i]){
            if(a[i].ff == A){
                right_good.pb({a[i].ss,i});
            }
        }
    }

    sort(all(right_good));
    int siz = sz(right_good);
    right_good.insert(right_good.begin(),{0,0});

    fill(all(vis),0);
    rep1(i,siz){
        if(!vis[i]){
            dfs2(right_good[i].ss,i);
        }
    }

    fill(all(vis),0);
    rev(i,siz,1){
        if(!vis[i]){
            dfs3(right_good[i].ss,i);
        }
    }

    vector<pii> ans;
    rep1(i,n){
        if(a[i].ff == 0){
            int mn = mn_reach[i], mx = mx_reach[i];
            int cnt = max(mx-mn+1,0);
            ans.pb({a[i].ss,cnt});
        }
    }

    sort(rall(ans));

    for(auto [y,c] : ans){
        cout << c << endl;
    }
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

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• Subtask 2: 0 / 8
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