Submission #2024579

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Source Code Expand

#include <iostream>
#include <fstream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <cstring>
#include <string>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <algorithm>
using namespace std;
 
#define REP(i,n) for(int i=0; i<n; ++i)
#define FOR(i,a,b) for(int i=a; i<=b; ++i)
#define FORR(i,a,b) for (int i=a; i>=b; --i)
#define ALL(c) (c).begin(), (c).end()
 
typedef long long ll;
typedef vector<int> VI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef vector<VI> VVI;
typedef pair<int,int> P;
typedef pair<ll,ll> PL;

VL slide_max(VL a, int k){
    VL ret;
    deque<int> dq;
    REP(i,a.size()){
        while (!dq.empty() && a[dq.back()] <= a[i]) dq.pop_back();
        dq.push_back(i);
        ret.push_back(a[dq.front()]);
        if (i - k + 1 >= 0){
            if (dq.front() == i - k + 1) dq.pop_front();
        }
    }
    return ret;
}

int main() {
    int n, m, k;
    cin >> n >> m >> k;
    VL a(n);
    REP(i,n) scanf("%lld", &a[i]);

    VL dp(n);
    REP(i,n) dp[i] = a[i];

    REP(x,k-1){
        VL ma = slide_max(dp, m);

        REP(i,n-1) dp[i+1] = ma[i] + a[i+1] * (x + 2);

        // REP(i,n) cout << dp[i] << " ";
        // cout << endl;
    }

    ll ma = 0;
    REP(i,n) ma = max(ma, dp[i]);
    cout << ma << endl;
    
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:48:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     REP(i,n) scanf("%lld", &a[i]);
                                  ^

Judge Result