Submission #689956

#	Time	Username	Problem	Language	Result	Execution time	Memory
689956		White	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	0 / 100	195 ms	262144 KiB

sortbooks

#include <bits/stdc++.h>
#define endl "\n"
using namespace std;

vector<pair<long long,long long>>ans[1000005];
long long red[1000005];
stack<pair<long long,long long>>s;

long long binary(long long v,long long num){

    long long l=0,r=ans[v].size()-1;
    while(l<r){
        long long mid=(r+l)/2;
        if(ans[v][mid].second<num)l=mid+1;
        else r=mid;
    }

    return l;
}

int main(){

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

    long long n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++)cin>>red[i];
    s.push({red[0],0});
    for(int i=1;i<n;i++){
            ans[i]=ans[i-1];
            while(s.empty()!=true && red[i]>s.top().first)s.pop();
            if(s.empty()!=true){
                ans[i].push_back({s.top().first+red[i],s.top().second});
                for(int j=0;j<ans[i].size()-1;j++){
                    if(ans[i][j].first<red[ans[i][j].second]+red[i]){
                        ans[i][j].first=red[ans[i][j].second]+red[i];
                    }
                }
            }
            s.push({red[i],i});
    }

    /**
    for(int i=0;i<n;i++){
            cout<<i<<": ";
        for(int j=0;j<ans[i].size();j++){
            cout<<ans[i][j].first<<";"<<ans[i][j].second<<" ";
        }
        cout<<endl;
    }
    **/

    for(int i=0;i<m;i++){
        long long a,b,c,now;
        cin>>a>>b>>c;
        a--;b--;
        now=binary(b,a);
        if(now>ans[b].size()-1)now=ans[b].size()-1;
        if(c>=ans[b][now].first)cout<<1<<endl;
        else cout<<0<<endl;
    }

    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:35:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |                 for(int j=0;j<ans[i].size()-1;j++){
      |                             ~^~~~~~~~~~~~~~~~
sortbooks.cpp:59:15: 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]
   59 |         if(now>ans[b].size()-1)now=ans[b].size()-1;
      |            ~~~^~~~~~~~~~~~~~~~

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