Submission #878788

#	Time	Username	Problem	Language	Result	Execution time	Memory
878788		12345678	Construction of Highway (JOI18_construction)	C++17	7 / 100	2091 ms	600 KiB

construction

#include <bits/stdc++.h>

using namespace std;

const int nx=1e5+5;
int n, c[nx], p[nx], u, v;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    p[1]=1;
    cin>>n;
    for (int i=1; i<=n; i++) cin>>c[i];
    for (int i=1; i<n; i++)
    {
        cin>>u>>v;
        p[v]=u;
        vector<int> tmp;
        while (p[u]!=u) tmp.push_back(c[u]), c[u]=c[v], u=p[u];
        tmp.push_back(c[1]);
        c[1]=c[v];
        int cnt=0;
        for (int j=0; j<tmp.size(); j++) for (int k=j+1; k<tmp.size(); k++) if (tmp[k]>tmp[j]) cnt++;
        cout<<cnt<<'\n';
    }
}

Compilation message (stderr)

construction.cpp: In function 'int main()':
construction.cpp:23:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for (int j=0; j<tmp.size(); j++) for (int k=j+1; k<tmp.size(); k++) if (tmp[k]>tmp[j]) cnt++;
      |                       ~^~~~~~~~~~~
construction.cpp:23:59: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for (int j=0; j<tmp.size(); j++) for (int k=j+1; k<tmp.size(); k++) if (tmp[k]>tmp[j]) cnt++;
      |                                                          ~^~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 9
• Subtask 3: 0 / 84