Submission #475732

#	Time	Username	Problem	Language	Result	Execution time	Memory
475732		definitelynotmee	Papričice (COCI20_papricice)	C++98	50 / 110	1086 ms	15444 KiB

papricice

#include<bits/stdc++.h>
#define mp make_pair
#define mt make_tuple
#define ff first
#define ss second
using namespace std;
template <typename T>
using matrix = vector<vector<T>>;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INFL = (1LL<<62)-1;
const int INF = (1<<30)-1;
const double EPS = 1e-7;
const int MOD = 1e9 + 7;
const int MAXN = 1e6+1;



int main(){

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;
    matrix<int> grafo(n+1);
    vector<pii> edge(n-1);
    for(int i = 0; i < n-1; i++){
        int a, b;
        cin >> a >> b;
        grafo[a].push_back(b);
        grafo[b].push_back(a);
        edge[i] = {a,b};
    }

    function<int(int,int)> sizedfs = [&](int id, int last){
        int ret = 1;
        for(int i = 0; i < grafo[id].size(); i++){
            if(grafo[id][i]!=last)
                ret+=sizedfs(grafo[id][i],id);
        }
        return ret;
    };
    int c1, c2;
    int resp = INF;
    function<int(int,int)> dfs = [&](int id, int last){
        int ret = 1;
        for(int i = 0; i < grafo[id].size(); i++){
            if(grafo[id][i]!=last){
                int cur =dfs(grafo[id][i],id);
                resp = min(resp,max(c2,max(cur,c1-cur))-min(c2,min(cur,c1-cur)));
                ret+=cur;
            }
                
        }
        return ret;
    };

    for(int i = 0; i < n-1; i++){
        c1 = sizedfs(edge[i].ff,edge[i].ss);
        c2 = sizedfs(edge[i].ss,edge[i].ff);
        dfs(edge[i].ff,edge[i].ss);
        swap(c1,c2);
        dfs(edge[i].ss,edge[i].ff);
    }
    
    cout << resp << '\n';
    
    return 0;

}

Compilation message (stderr)

papricice.cpp: In lambda function:
papricice.cpp:39:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i = 0; i < grafo[id].size(); i++){
      |                        ~~^~~~~~~~~~~~~~~~~~
papricice.cpp: In lambda function:
papricice.cpp:49:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |         for(int i = 0; i < grafo[id].size(); i++){
      |                        ~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 35 / 35
• Subtask 3: 0 / 60