Submission #95916

#	Time	Username	Problem	Language	Result	Execution time	Memory
95916		toonewbie	Bitaro’s Party (JOI18_bitaro)	C++17	100 / 100	1959 ms	309752 KiB

bitaro

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define _CRT_SECURE_NO_WARNINGS
/****Author: Barish Namazov****/
#include <bits/stdc++.h>

using namespace std;

/***TEMPLATE***/
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()

#define F first
#define S second
#define pb push_back

#define endl '\n'

const int max4 = 10004;
const int maxx = 200005;
const int max6 = 1000006;
const int lg5 = 17;

const int INF = 2 * 1000000007;
const long long INFLL = 4LL * 1000000000 * 1000000000;

/***************/

int powmod (int a, int b, int mod) {
    int res = 1; a %= mod;
    for (; b; b >>= 1) {
        if (b & 1) {
            res = 1LL * res * a % mod;
        }
        a = 1LL * a * a % mod;
    }
    return res;
}

int gcd (int a, int b) {
    while (b > 0) {
        int t = a % b;
        a = b, b = t;
    }
    return a;
}

int lcm (int a, int b) {
    return (a / gcd (a, b)) * b;
}

int is_prime (int n) {
    if (n <= 1 || n > 3 && (n % 2 == 0 || n % 3 == 0))
        return 0;
    for (int i = 5, t = 2; i * i <= n; i += t, t = 6 - t)
        if (n % i == 0)
            return 0;
    return 1;
}

/******Don't forget to use long long when needed!!******/

const int Block = 220;

int n, m, q;
vector <int> g[maxx];

vector <pair <int, int>> dp[maxx]; int res[maxx];
inline void update(int u, int v) {
    for (auto i : dp[u]) {
        res[i.S] = i.F;
    }
    for (auto i : dp[v]) {
        res[i.S] = max(res[i.S], i.F + 1);
    }
    for (auto &i : dp[u]) {
        i.F = max(i.F, res[i.S]); res[i.S] = 0;
    }
    for (auto i : dp[v]) {
        if (res[i.S] > 0) {
            dp[u].pb({i.F + 1, i.S}); res[i.S] = 0;
        }
    } sort(rall(dp[u]));
    /*
    vector <pair <int, int>> A, B;
    for (auto i : dp[u]) B.pb(i);
    for (auto i : dp[v]) {
        if (res[i.S] > 0) {
            A.pb({i.F + 1, i.S}); res[i.S] = 0;
        }
    } //sort(rall(A)); sort(rall(B));
    while (!dp[u].empty()) dp[u].pop_back();
    int ptr1 = 0, ptr2 = 0;
    while (ptr1 < A.size() && ptr2 < B.size()) {
        if (A[ptr1] > B[ptr2]) {
            dp[u].pb(A[ptr1++]);
        } else {
            dp[u].pb(B[ptr2++]);
        }
    }
    while (ptr1 < A.size()) dp[u].pb(A[ptr1++]);
    while (ptr2 < B.size()) dp[u].pb(B[ptr2++]);*/

    while (dp[u].size() > Block) {
        dp[u].pop_back();
    }
}

int has[maxx], lpath[maxx];
int main() {
    //freopen("in.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    ios_base :: sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n >> m >> q;
    int a, b;
    for (int i = 1; i <= m; i++) {
        cin >> a >> b;
        g[b].pb(a);
    }
    for (int i = 1; i <= n; i++) {
        for (int j : g[i]) {
            update(i, j);
        }
        if (dp[i].size() < Block) {
            dp[i].pb({0, i});
        }
    }
    vector <int> bad; int tmp;
    int t, y;
    while (q --) {
        cin >> t >> y;
        for (int i = 0; i < y; i++) {
            cin >> tmp;
            bad.pb(tmp); has[tmp] = 1;
        }
        if (y < Block) {
            int res = -1;
            for (auto i : dp[t]) {
                if (has[i.S] == 0) {
                    res = i.F; break;
                }
            }
            cout << res << endl;
        } else {
            for (int i = 1; i <= t; i++) {
                lpath[i] = -has[i];
                for (int j : g[i]) {
                    if (lpath[j] != -1) {
                        lpath[i] = max(lpath[i], lpath[j] + 1);
                    }
                }
            }
            cout << lpath[t] << endl;
        }
        for (int i = 0; i < y; i++) {
            has[bad[i]] = 0;
        }
        bad.clear();
    }
    return 0;
}

Compilation message (stderr)

bitaro.cpp:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")
 
bitaro.cpp: In function 'int is_prime(int)':
bitaro.cpp:55:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if (n <= 1 || n > 3 && (n % 2 == 0 || n % 3 == 0))
                   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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