Submission #140428

#	Time	Username	Problem	Language	Result	Execution time	Memory
140428		2fat2code	3단 점프 (JOI19_jumps)	C++14	0 / 100	4003 ms	12060 KiB

jumps

#include <bits/stdc++.h>
#define ll long long
#define all(a) (a).begin(), (a).end()
//#pragma GCC optimize("O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define sz() size()
#define fr first
#define sc second
#define pb push_back
#define er erase
#define in insert
#define pi pair<int,int>
#define pii pair<pair<int,int>,int>
#define mp make_pair
#define int long long
#define rc(s) return cout<<s,0
#define rcc(s) cout<<s,exit(0)
//#define cin fin
//#define cout fout
using namespace std;

//ifstream fin("file.in");
//ofstream fout("file.out");

const int nmax=1e3+5;
const int mod=1e9+7;
const int mod1=998244353;

int n,a[1000005],b[1000005];

int32_t main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n;
	for(int i=0;i<n;i++) cin >> a[i];
    vector <pair <int, int> > e;
    stack<int>st;
    for (int i = 0; i < n; i++) {
        while (!st.empty() && a[st.top()] <= a[i]) {
            e.push_back({st.top(), i});
            st.pop();
        }
        if (!st.empty()) {
            e.push_back({st.top(), i});
        }
        st.push(i);
    }
    int q,l,r;
    cin >> q;
    for(int i=1;i<=q;i++){
        cin >> l >> r;
        int ans=0;
        for(int j=0;j<e.size();j++){
            if(e[j].fr>= (l-1) && e[j].fr<=(r-1) && e[j].sc>=l && e[j].sc<=r){
                for(int t=e[j].sc+1;t<=r;t++){
                    if((t-e[j].sc)>=(e[j].sc-e[j].fr)) ans=max(ans,a[e[j].fr]+a[e[j].sc]+a[t]);
                }
            }
        }
        cout << ans << '\n';
    }
}

Compilation message (stderr)

jumps.cpp: In function 'int32_t main()':
jumps.cpp:53:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<e.size();j++){
                     ~^~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54