Submission #666732

#	Time	Username	Problem	Language	Result	Execution time	Memory
666732		Nursik	Traffickers (RMI18_traffickers)	C++14	100 / 100	2160 ms	64640 KiB

traffickers

#include <stdio.h>
 
#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
//#include<bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ld long double
 
const ll maxn = 1e5 + 1, maxm = 1e6 + 1;
const ll mod = 1e9 + 7, inf = 1e9, block = 550, hb = 31, base = 1000050017, biginf = 5e18;
const ld eps = 1e-9;
 
int n, k, q, timer, lac;
int tin[maxn], tout[maxn], used[maxn], par[maxn], p[maxn], sz[maxn], anc[maxn], zu[maxn], zu2[maxn];
vector<int> g[maxn];
vector<pair<int, int>> zp[maxn];
int type[maxn], uu[maxn], vv[maxn], t[maxn], t2[maxn], lc[maxn];;
int get(int v){
    if (v == p[v])
        return v;
    return p[v] = get(p[v]);
}
void unite(int a, int b, int x){
    a = get(a), b = get(b);
    if (sz[a] > sz[b])
        swap(a, b);
    p[a] = b, anc[b] = x;
    sz[b] += sz[a];
}
void dfs(int v = 1, int pr = 0){
    par[v] = pr, tin[v] = ++timer;
    used[v] = 1;
    anc[v] = v;
    for (auto to : g[v]){
        if (to != pr){
            dfs(to, v);
            unite(to, v, v);
        }
    }
    for (auto it : zp[v]){
        int ver = it.f, x = it.s;
        if (used[ver]){
            lc[x] = anc[get(ver)];
        }
    }
    tout[v] = ++timer;
}
struct fenwick{
    int f[maxn];
    void upd(int pos, int val){
        for (int i = pos; i <= timer; i |= (i + 1)){
            f[i] += val;
        }
    }
    int get(int pos){
        int res = 0;
        for (int i = pos; i >= 1; i = (i & (i + 1)) - 1){
            res += f[i];
        }
        return res;
    }
} rt[21][20];
ll calc(int x, int d, int pac, int y){
    ll ky = y / d, k2 = y % d;
    ll z = rt[d][pac].get(x);
    ll sum = ky * z + (k2 >= pac) * z;
    return sum;
}
ll calc2(int u, int v, int x){
    if (x < 0)
        return 0;
    ll res = 0;
    ll parik = par[lac];
    for (int i = 1; i <= 20; ++i){
        for (int j = 0; j < i; ++j){
            ll add = calc(tin[u], i, j, x) + calc(tin[v], i, j, x) - calc(tin[lac], i, j, x);
            if (parik > 0){
                add -= calc(tin[parik], i, j, x);
            }
            res += add;
        }
    }
    return res;
}
void upd(int u, int v, int x, int is){
    vector<int> path;
    while (u != x){
        path.pb(u);
        u = par[u];
    }
    vector<int> pp;
    while (v != x){
        pp.pb(v);
        v = par[v];
    }
    pp.pb(x);
    reverse(pp.begin(), pp.end());
    for (auto it : pp){
        path.pb(it);
    }
    int len = (int)path.size();
    if (is == 1){
        for (int i = 0; i < len; ++i){
            rt[len][i].upd(tin[path[i]], 1);
            rt[len][i].upd(tout[path[i]], -1);
        }
    }
    else{
        for (int i = 0; i < len; ++i){
            rt[len][i].upd(tin[path[i]], -1);
            rt[len][i].upd(tout[path[i]], 1);
        }
    }
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0); 
    cin >> n;
    for (int i = 1; i <= n; ++i){
        sz[i] = 1;
        p[i] = i;
    }
    for (int i = 1; i < n; ++i){
        int u, v;
        cin >> u >> v;
        g[u].pb(v);
        g[v].pb(u);
    }
    int kekich = 0;
    cin >> k;
    for (int i = 1; i <= k; ++i){
        cin >> zu[i] >> zu2[i];
        zp[zu[i]].pb(mp(zu2[i], ++kekich));
        zp[zu2[i]].pb(mp(zu[i], kekich));
    }
    cin >> q;
    for (int i = 1; i <= q; ++i){
        cin >> type[i];
        cin >> uu[i] >> vv[i];
        zp[uu[i]].pb(mp(vv[i], ++kekich));
        zp[vv[i]].pb(mp(uu[i], kekich));
        if (type[i] == 3){
            cin >> t[i] >> t2[i];
        }
    }
    dfs(); 
    int lkek = 0;
    for (int i = 1; i <= k; ++i){
        ++lkek;
        int lca = lc[lkek];
        upd(zu[i], zu2[i], lca, 1);
    }
    for (int i = 1; i <= q; ++i){
        ++lkek;
        if (type[i] == 1){
            int lca = lc[lkek];
            upd(uu[i], vv[i], lca, 1);
        }
        else if (type[i] == 2){
            int lca = lc[lkek];
            upd(uu[i], vv[i], lca, 0);
        }
        else{
            lac = lc[lkek];
            ll ans = calc2(uu[i], vv[i], t2[i]) - calc2(uu[i], vv[i], t[i] - 1);
            cout << ans << '\n';
        }
    }
}

• Subtask 1: 15 / 15
• Subtask 2: 45 / 45
• Subtask 3: 40 / 40