Submission #153655

#	Time	Username	Problem	Language	Result	Execution time	Memory
153655		semiauto	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	64 / 100	1535 ms	262148 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
int n,m,i,j,l,r,ans;
int mas[1000001],par[1000001],val[1000001],ori[1000001],hey[3000001],pre[1000001][20];
pair <int,int> p[1000001][20];
vector <int> v[1000001];
void dfs(int u) {
    int i;
    p[u][0]={par[u],val[u]};
    for (i=1;i<20;i++)
        if (p[p[u][i-1].first][i-1].first)
            p[u][i]={p[p[u][i-1].first][i-1].first,max(p[u][i-1].second,p[p[u][i-1].first][i-1].second)};
    for (i=0;i<(v[u].size());i++)
        dfs(v[u][i]);
}
int solve(int a,int b) {
    int c=ori[b-a+1];
    return max(pre[a][c],pre[b-(1<<c)+1][c]);
}
int main() {
    for (i=1;i<20;i++)
        ori[(1<<i)]=i;
    for (i=1;i<1000001;i++)
        if (!ori[i])
            ori[i]=ori[i-1];
    cin>>n>>m;
    for (i=1;i<=n;i++) {
        cin>>mas[i];
        pre[i][0]=mas[i];
    }
    for (j=1;j<20;j++)
        for (i=1;(i+(1<<j)-1)<=n;i++)
            pre[i][j]=max(pre[i][j-1],pre[i+(1<<(j-1))][j-1]);
    for (i=n;i>0;i--) {
        for (;r>0;r--)
            if (mas[hey[r]]>=mas[i])
                break;
        par[i]=hey[r];
        v[hey[r]].push_back(i);
        hey[++r]=i;
    }
    for (i=1;i<=n;i++)
        if (par[i]>(i+1))
            val[i]=mas[i]+solve(i+1,par[i]-1);
    for (i=0;i<(v[0].size());i++)
        dfs(v[0][i]);
    while (cin>>l>>r>>m) {
        if (l==r) {
            cout<<"1"<<endl;
            continue;
        }
        ans=0;
        for (i=19;i>=0;i--)
            if (p[l][i].first && p[l][i].first<=r) {
                ans=max(ans,p[l][i].second);
                l=p[l][i].first;
            }
        if (r>l)
            ans=max(ans,mas[l]+solve(l+1,r));
        if (ans>m)
            cout<<"0"<<endl;
        else
            cout<<"1"<<endl;
    }
}

Compilation message (stderr)

sortbooks.cpp: In function 'void dfs(int)':
sortbooks.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i=0;i<(v[u].size());i++)
              ~^~~~~~~~~~~~~~
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i=0;i<(v[0].size());i++)
              ~^~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 0 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 0 / 23