Submission #1062633

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062633		TimDee	Peru (RMI20_peru)	C++17	0 / 100	1 ms	348 KiB

peru

#include "peru.h"
#include <bits/stdc++.h>
using namespace std;
 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("popcnt,avx2")

#define forn(i,n) for(int i=0; i<(n); ++i)
#define pb push_back
#define pi pair<int,int>
#define f first
#define s second 
using ll = long long;
const int N=2005;
ll dp[N];

int solve(int n, int k, int* v){
    const int mod = 1e9+7;
    #define int long long

    deque<pi> s;
    deque<pi> z;
    ll ans=0;
    forn(i,n) {
        while (s.size() && s[0].s<=i-k) s.pop_front();
        while (z.size() && z[0].s<=i-k) z.pop_front();
        while (s.size() && s.back().f < v[i]) {
            s.pop_back();
        }
        if (s.size()) {
            while (z.size() && z.back().s > s.back().s) z.pop_back();
            if (s.back().s<i-1) z.push_back({dp[s.back().s]+v[i],s.back().s+1});
        } else {
            while (z.size()) z.pop_back();
            if (k>1 && i-k>=0) z.push_back({dp[i-k]+v[i],i-k+1});
        }
        s.pb({v[i],i});

        if (i-k>=0) {
            if (z.size()) if (dp[i-k]+s[0].f <= z.front().f) z.push_front({dp[i-k]+s[0].f,i-k+1});
        }

        //cout<<"? "<<i<<": "<<dp[i]<<'\n';
        //for(auto&x:s) cout<<x.f<<','<<x.s<<"  "; cout<<'\n';
        //for(auto&x:z) cout<<x.f<<','<<x.s<<"  "; cout<<'\n';
        //cout<<'\n';

        dp[i]=s[0].f;
        if (i-k>=0) dp[i]+=dp[i-k];
        if (i) dp[i]=min(dp[i],dp[i-1]+v[i]);
        //assert(z.size());
        if (z.size()) dp[i] = min(dp[i],1ll*z[0].f);
        if (i) {
            while (z.size() && z.back().f >= dp[i-1]+v[i]) z.pop_back();
            z.pb({dp[i-1]+v[i],i});
        } else {
            while (z.size() && z.back().f > v[i]) z.pop_back();
            z.pb({v[i],i});
        }
        ans=(ans*23)%mod;
        ans=(ans+dp[i])%mod;
        //cout<<i<<": "<<dp[i]<<'\n';
        //for(auto&x:s) cout<<x.f<<','<<x.s<<"  "; cout<<'\n';
        //for(auto&x:z) cout<<x.f<<','<<x.s<<"  "; cout<<'\n';
        //cout<<'\n';
    }
    return ans;
    #undef int
}

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