Submission #534045

#	Time	Username	Problem	Language	Result	Execution time	Memory
534045		Lobo	Bitaro’s Party (JOI18_bitaro)	C++17	14 / 100	745 ms	119176 KiB

bitaro

#include<bits/stdc++.h>
using namespace std;

// const long long inf = (long long) 1e18 + 10;
const int inf = (int) 1e9 + 10;
// #define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 110000
#define B 100

int n, m, q, dp1[maxn], mark[maxn];
vector<pair<int,int>> dp[maxn];
vector<int> g[maxn], g1[maxn];

void solve() {
    cin >> n >> m >> q;

    for(int i = 1; i <= m; i++) {
        int u,v; cin >> u >> v;
        g[u].pb(v);
        g1[v].pb(u);
    }

    //pegar os B melhores de cada um

    for(int i = 1; i <= n; i++) {
        priority_queue<pair<int,pair<int,int>>> pq;
        for(auto v : g1[i]) {
            pq.push(mp(dp[v][0].fr,mp(v,0)));
        }

        while(pq.size() && dp[i].size() <= B) {
            int v = pq.top().sc.fr;
            int id = pq.top().sc.sc;
            dp[i].pb(mp(dp[v][id].fr+1,dp[v][id].sc));
            pq.pop();

            id++;
            if(id != dp[v].size()) {
                pq.push(mp(dp[v][id].fr,mp(v,id)));
            }
        }

        if(dp[i].size() < B) {
            dp[i].pb(mp(0,i));
        }
    }

    for(int i = 1; i <= q; i++) {
        int u; cin >> u;
        int qtd; cin >> qtd;
        vector<int> bl;
        while(qtd--) {
            int v; cin >> v;
            bl.pb(v);
            mark[v] = 1;
        }
        if(bl.size() < B) {
            int ans = -1;
            int id = 0;
            while(id != dp[u].size()) {
                if(mark[dp[u][id].sc]) {
                    id++;
                    continue;
                }
                ans = dp[u][id].fr;
                break;
            }
            cout << ans << endl;
        }
        else {
            for(int i = 1; i <= u; i++) {
                dp1[i] = 0;
                if(mark[i]) dp1[i] = -inf;

                for(auto v : g1[i]) {
                    dp1[i] = max(dp1[i],dp1[v]+1);
                }
            }

            if(dp1[u] < 0) cout << -1 << endl;
            else cout << dp1[u] << endl;
        }
        for(auto v : bl) mark[v] = 0;
    }


}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);

    int tt = 1;
    // cin >> tt;
    while(tt--) solve();

}

Compilation message (stderr)

bitaro.cpp: In function 'void solve()':
bitaro.cpp:46:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |             if(id != dp[v].size()) {
      |                ~~~^~~~~~~~~~~~~~~
bitaro.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |             while(id != dp[u].size()) {
      |                   ~~~^~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 0 / 86