Submission #494231

#	Time	Username	Problem	Language	Result	Execution time	Memory
494231		emortly	Peru (RMI20_peru)	C++14	0 / 100	1 ms	340 KiB

peru

#include<bits/stdc++.h>
using namespace std;

struct q{
    int end,a,dp;
};

int solve(int n,int k,int* s){
    int a[n+1]={};
    for(int i=1;i<=n;i++)a[i]=s[i-1];
    long long dp[n+1]={};
    deque<q>d;
    multiset<long long>st;
    for(int i=1;i<=n;i++){
        d.push_back(q{i+k,a[i],dp[i-1]});
        st.insert({0ll+a[i]+dp[i-1]});
        while(!d.empty()&&d.front().end<=i){
            st.erase(st.find(0ll+d.front().a+d.front().dp));
            d.pop_front();
        }
        /*vector<q>vec;
        while(!d.empty()&&d.front().a<a[i]){
            q dd=d.front();
            d.pop_front();
            st.erase(st.find(0ll+dd.a+dd.dp));

            q ddd=q{dd.end,a[i],dd.dp};
            st.insert(0ll+ddd.a+ddd.dp);
            vec.push_back(ddd);
        }
        reverse(vec.begin(),vec.end());
        for(auto e:vec)d.push_front(e);
        //cout<<d.size()<<"\n";
        dp[i]=*st.begin();*/
    }
    //for(int i=1;i<=n;i++)cout<<dp[i]<<" ";cout<<"\n";
    long long res=0;
    long long pow23=1;
    const int MOD=1e9+7;
    for(int i=n;i>=1;i--)res+=1ll*dp[i]*pow23,res%=MOD,pow23*=23,pow23%=MOD;
    return res;
}

/*signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n,k;
    cin>>n>>k;
    int a[n];
    for(auto&i:a)cin>>i;
    cout<<solve(n,k,a)<<"\n";
}*/

Compilation message (stderr)

peru.cpp: In function 'int solve(int, int, int*)':
peru.cpp:15:38: warning: narrowing conversion of 'dp[(i - 1)]' from 'long long int' to 'int' [-Wnarrowing]
   15 |         d.push_back(q{i+k,a[i],dp[i-1]});
      |                                ~~~~~~^

• Subtask 1: 0 / 18
• Subtask 2: 0 / 31
• Subtask 3: 0 / 51