Submission #1119899

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119899		somefolk	Climbers (RMI18_climbers)	C++14	0 / 100	2 ms	592 KiB

climbers

#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <unordered_set>
#include <complex>
#include <list>
#include <chrono>
#include <random>
#include <stack>
#include <iomanip>
#include <fstream>
#include <cassert>
using namespace std;
 
#define endl "\n"
// #define int long long
 
const int INF = 2 * 1e5 + 5;
const int MOD = 1e9 + 7;
 
void solve(){
    int n;
    cin >> n;
    vector<int> in(n);
    for(int i = 0; i < n; i++){
        cin >> in[i];
    }

    // remove increasing or decreasing sequences
    vector<int> a;
    bool turn = 0;
    for(int i = 0; i < n; i++){
        if(!turn && in[i] > in[i+1]){
            a.push_back(in[i]);
            turn = 1;
        } else if(turn && in[i] < in[i+1]) {
            a.push_back(in[i]);
            turn = 0;
        }
    }

    // for(auto &i : a) cout << i << " ";

    int l = 0, r = n-1, sol = a[l];
    while(l < r){
        if(a[l] <= a[r]){
            while(a[l] <= a[r] && l < r){
                // cout << "1: " << l << " " << r << "| " << sol << endl;
                sol += abs(a[l+1] - a[l]);
                l++;
            }
        } else {
            while(a[r] <= a[l] && l < r){
                // cout << "2: " << l << " " << r << "| " << sol << endl;
                r--;
            }
        }
    }

    cout << sol << endl;
}
 
int32_t main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int t = 1;
    // cin >> t;
    while(t--) solve();
    return 0;
}

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