Submission #872937

#	Time	Username	Problem	Language	Result	Execution time	Memory
872937		vjudge1	Climbers (RMI18_climbers)	C++17	5 / 100	1 ms	856 KiB

climbers

#include<bits/stdc++.h>
using namespace std;
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")
#define f first 
#define s second
typedef long long ll;
ll a[200100];
void solve(){    
    ll n; cin>>n;
    for(ll i=1; i<=n; i++){
        cin>>a[i];
    }
    vector<ll> v;
    for(ll i=1; i<=n; i++){
        if(v.size() < 2) v.push_back(a[i]);
        else if(v[v.size()-1] > v[v.size()-2] && v[v.size()-1] < a[i]){
            v.pop_back();
            v.push_back(a[i]);
        } else if(v[v.size()-1] < v[v.size()-2] && v[v.size()-1] > a[i]){
            v.pop_back();
            v.push_back(a[i]);
        } else{
            v.push_back(a[i]);
        }
    }
    ll l=0,r=v.size()-1;
    vector<ll> ord;
    while(l<=r){
        if(v[l] <= v[r]){
            ord.push_back(v[l]);
            l++;
        } else{
            ord.push_back(v[r]);
            r--;
        }
    }
    ll ans=0;
    for(ll i=0; i<ord.size()-1; i++){
        ans+=abs(ord[i+1]-ord[i]);
    }
    cout<<ans;
}   
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    // cin>>t;
    for(int i = 1; i <=  t; i++){
        // cout<<"Case "<<i<<":\n";
        solve();
        cout<<'\n';
    }
}

Compilation message (stderr)

climbers.cpp: In function 'void solve()':
climbers.cpp:39:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(ll i=0; i<ord.size()-1; i++){
      |                 ~^~~~~~~~~~~~~

• Subtask 1: 0 / 25
• Subtask 2: 5 / 25
• Subtask 3: 0 / 50