Submission #897871

#	Time	Username	Problem	Language	Result	Execution time	Memory
897871		White	Bigger segments (IZhO19_segments)	C++14	0 / 100	0 ms	348 KiB

segments

#pragma GCC optimize <"O3">
#include <bits/stdc++.h>
#define endl "\n"
using namespace std;

long long red[500005];
vector<long long>clr,cur;

long long binary(long long now){
    long long l=0,r=cur.size()-1,mid,kr=cur.size()-1;
    if(cur.empty())return -1;

    while(l<r){
        mid=(l+r)/2;
        if(cur[kr]-cur[mid]>=now)l=mid+1;
        else r=mid;
    }

    if(cur[kr]<now)return -1;
    if(cur[kr]-cur[l]<now)l--;
    return l;
}

int main(){

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

    long long n;
    cin>>n;
    for(int i=0;i<n;i++)cin>>red[i];

    long long br=1,L=red[0];

    //cur.push_back(1);cur.push_back(3);cur.push_back(3);cur.push_back(3);cur.push_back(4);cur.push_back(4);
    //cout<<binary(0)<<endl;

    for(int i=1;i<n;i++){
        long long N=red[i];
        if(N>=L){
            br++;
            L=N;
            cur=clr;
        }else{
            long long kude=binary(L-N);
            //cout<<kude<<endl;
            if(kude==-1){
                if(cur.empty()==true)cur.push_back(N);
                else cur.push_back(cur[cur.size()-1]+N);
            }else{
                br++;
                if(kude>0)L=N+cur[cur.size()-1]-cur[kude-1];
                else L=N+cur[cur.size()-1];
                while(cur.empty()==false)cur.pop_back();
            }
        }
    }
    cout<<br<<endl;

    return 0;
}

Compilation message (stderr)

segments.cpp:1:22: warning: '#pragma GCC optimize' is not a string or number [-Wpragmas]
    1 | #pragma GCC optimize <"O3">
      |                      ^

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27