Submission #722435

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
722435	2023-04-12 00:38:23	GrandTiger1729	Bridges (APIO19_bridges)	C++17	100 / 100	2734 ms	9764 KiB

bridges

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#include <bits/stdc++.h>
using namespace std;
struct DSU {
    vector<int> rt, sz;
    vector<int> stk;
    DSU(int n){
        rt.resize(n);
        iota(rt.begin(), rt.end(), 0);
        sz.resize(n, 1);
    }
    int find(int u){
        if (u == rt[u]) return u;
        return find(rt[u]);
    }
    bool same(int u, int v){
        return find(u) == find(v); 
    }
    void unite(int u, int v){
        u = find(u), v = find(v);
        if (u == v) return;
        if (sz[u] > sz[v])
            swap(u, v);
        rt[u] = v;
        sz[v] += sz[u];
        stk.push_back(u);
    }
    void undo(){
        int u = stk.back(), v = rt[u];
        stk.pop_back();
 
 
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Compilation message (stderr)

bridges.cpp: In function 'int main()':
bridges.cpp:108:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |             while (i < eed.size() && eed[i].w >= w){
      |                    ~~^~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 14 / 14
• Subtask 5: 13 / 13
• Subtask 6: 27 / 27