Submission #766188

#	Time	Username	Problem	Language	Result	Execution time	Memory
766188		birthdaycake	Grapevine (NOI22_grapevine)	C++14	0 / 100	3070 ms	13508 KiB

Main

#ifndef _GLIBCXX_NO_ASSERT
#include <cassert>
#endif
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
 
#if __cplusplus >= 201103L
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#endif
 
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
 
 
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <fstream>
#define endl '\n'
#define int long long
#define mod 1000000007
using namespace std;


vector<pair<int,int>>adj[200001];
int grape[200001], ans = 1e18;

int vs[200001];
void dfs(int x){
    if(grape[x]) ans = min(ans, vs[x]);
    for(auto s: adj[x]){
        if(!vs[s.first]){
            vs[s.first] = vs[x] + s.second;
            dfs(s.first);
        }
    }
}
signed main(){
    int n,q; cin >> n >> q;
    for(int i = 0; i < n - 1; i++){
        int a,b,c; cin >> a >> b >> c;
        adj[a].push_back({b,c});
        adj[b].push_back({a,c});
    }
    for(int i = 0; i < q; i++){
        int t; cin >> t;
        if(t == 1){
            int s; cin >> s;
            vs[s] = 1;
            dfs(s);
            cout << ans - 1 << endl;
            ans = 1e18;
            for(int j = 1; j <= n; j++) vs[j] = 0;
        }else if(t == 2){
            int v; cin >> v;
            grape[v] = !grape[v];
        }else{
            int a,b,c; cin >> a >> b >> c;
            for(int j = 0; j < adj[a].size(); j++){
                if(adj[a][j].first == b) adj[a][j].second = c;
            }
            for(int j = 0; j < adj[b].size(); j++){
                if(adj[b][j].first == a) adj[b][j].second = c;
            }
        }
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:125:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  125 |             for(int j = 0; j < adj[a].size(); j++){
      |                            ~~^~~~~~~~~~~~~~~
Main.cpp:128:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  128 |             for(int j = 0; j < adj[b].size(); j++){
      |                            ~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 18
• Subtask 6: 0 / 32