Submission #1106860

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106860		vjudge1	Sirni (COCI17_sirni)	C++14	28 / 140	642 ms	786432 KiB

sirni

#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
using namespace std;
using ll = long long;
const int nx=1e5+5;
int n, a[nx], par[nx];
ll ans=0;
vector<int> rar;
vector<pair<int, ii>> ed;
int find(int u)
{
    if(!par[u])
        return u;
    return par[u]=find(par[u]);
}
bool join(int u, int v)
{
    u=find(u);
    v=find(v);
    if(u==v)
        return 0;
    par[v]=u;
    return 1;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    for(int i = 1; i <= n; i++)
        cin>>a[i], rar.emplace_back(a[i]);
    sort(rar.begin(), rar.end());
    rar.erase(unique(rar.begin(), rar.end()), rar.end());
    n=rar.size();
    vector<int> last(rar.back() + 100, 0);
    for(int i = 1; i <= n; i++)
        a[i]=rar[i-1], last[a[i]]=i;
    for(int i = a[n] - 1; i >= 1; i--)
    {
        if(last[i])
            continue;
            last[i]=last[i+1];
    }
    for(int i = 1; i <= n; i++)
    {
        if(last[a[i]+1])
            ed.push_back({a[last[a[i]+1]]%a[i], {i, last[a[i]+1]}});
        for(int j = 2*a[i]; j < a[n]; j+=a[i])
            if(last[j])
                ed.push_back({a[last[j]]%a[i], {i, last[j]}});
    }
    sort(ed.begin(), ed.end());
    for(auto it:ed)
        if(join(it.se.fi, it.se.se))
            ans+=it.fi;
    cout<<ans;
}

Compilation message (stderr)

sirni.cpp: In function 'int main()':
sirni.cpp:41:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   41 |         if(last[i])
      |         ^~
sirni.cpp:43:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   43 |             last[i]=last[i+1];
      |             ^~~~

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 14 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14