Submission #197521

#	Time	Username	Problem	Language	Result	Execution time	Memory
197521		handlename	지구 온난화 (NOI13_gw)	C++17	40 / 40	244 ms	22084 KiB

gw

#include <bits/stdc++.h>
using namespace std;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin>>n;
    int arr[n];
    for (int i=0;i<n;i++) cin>>arr[i];
    if (n<2){
        cout<<1;
        return 0;
    }
    vector<pair<int,bool> > peaks; //height,true=bottom,false=top
    bool increasing;
    if (arr[1]>arr[0]){
        peaks.push_back(make_pair(arr[1],false));
        increasing=true;
    }
    else {
        peaks.push_back(make_pair(arr[0],false));
        peaks.push_back(make_pair(arr[1],true));
        increasing=false;
    }
    for (int i=2;i<n;i++){
        if (increasing){
            if (arr[i]>=arr[i-1]){
                peaks.pop_back();
                peaks.push_back(make_pair(arr[i],false));
            }
            else {
                peaks.push_back(make_pair(arr[i],true));
                increasing=false;
            }
        }
        else {
            if (arr[i]<=arr[i-1]){
                peaks.pop_back();
                peaks.push_back(make_pair(arr[i],true));
            }
            else {
                peaks.push_back(make_pair(arr[i],false));
                increasing=true;
            }
        }
    }
    if (peaks.back().second==true) peaks.pop_back();
    sort(peaks.begin(),peaks.end());
    int total=0,maxi=0;
    for (int i=peaks.size()-1;i>=0;i--){
        if (peaks[i].second) total--;
        else total++;
        maxi=max(maxi,total);
    }
    cout<<maxi;
}

• Subtask 1: 6 / 6
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11