151 lines
3.0 KiB
C++
151 lines
3.0 KiB
C++
/* Problem URL: https://codeforces.com/edu/course/2/lesson/7/1/practice/contest/289390/problem/C */
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#include <bits/stdc++.h>
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#include <ext/pb_ds/assoc_container.hpp>
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#include <ext/pb_ds/tree_policy.hpp>
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using namespace std;
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using namespace __gnu_pbds;
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template <class T, class comp = less<>>
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using ordered_set = tree<T, null_type , comp , rb_tree_tag , tree_order_statistics_node_update>;
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#define V vector
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#define rmin(a, b) a = min(a, b)
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#define rmax(a, b) a = max(a, b)
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#define rep(i, lim) for (int i = 0; i < (lim); i++)
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#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
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#define repv(i, v) for (auto &i : (v))
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#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
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#define sortv(v) sort(v.begin(), v.end())
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#define all(v) (v).begin(), (v).end()
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using vi = vector<int>;
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using vvi = vector<vi>;
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using vvvi = vector<vvi>;
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using vvvvi = vector<vvvi>;
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using ll = long long;
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using vl = vector<ll>;
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using vvl = vector<vl>;
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using vvvl = vector<vvl>;
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using vvvvl = vector<vvvl>;
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template<class v>
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auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
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os << vec[0];
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for (size_t i = 1; i < vec.size(); i++) {
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os << ' ' << vec[i];
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}
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os << '\n';
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<v> &vec)->istream& {
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for (auto &i : vec) {
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is >> i;
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}
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return is;
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}
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template<class v>
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auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
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for (auto &i : vec) {
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os << i[0];
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for (size_t j = 1; j < i.size(); j++) {
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os << ' ' << i[j];
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}
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os << '\n';
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}
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return os;
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}
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template<class v>
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auto operator>>(istream &is, vector<vector<v>> &vec)->istream& {
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for (auto &i : vec) {
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for (auto &j : i) {
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is >> j;
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}
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}
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return is;
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}
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int main()
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{
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ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int n, m;
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cin >> n >> m;
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vi dsu(n);
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rep(i, n) {
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dsu[i] = i;
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}
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vl add(n);
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function<int(int)> find_p = [&](int i) {
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if (dsu[i] == i) {
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return i;
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}
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int res = find_p(dsu[i]);
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if (res != dsu[i]) {
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add[i] += add[dsu[i]];
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}
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return dsu[i] = res;
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};
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auto join = [&](int a, int b) {
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a = find_p(a);
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b = find_p(b);
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if (a == b) {
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return;
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}
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dsu.push_back(dsu.size());
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add.push_back(0);
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dsu[a] = dsu.size() - 1;
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dsu[b] = dsu.size() - 1;
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};
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auto get = [&](int i) {
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find_p(i);
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return i == dsu[i] ? add[i] : add[i] + add[dsu[i]];
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};
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while (m--) {
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string op;
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cin >> op;
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if (op == "add") {
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int i;
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int v;
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cin >> i >> v;
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i = find_p(i - 1);
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add[i] += v;
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continue;
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}
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if (op == "join") {
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int a, b;
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cin >> a >> b;
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join(a - 1, b - 1);
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continue;
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}
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int i;
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cin >> i;
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cout << get(i - 1) << '\n';
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}
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}
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