Submission #417395

#	Time	Username	Problem	Language	Result	Execution time	Memory
417395		doowey	Cigle (COI21_cigle)	C++14	100 / 100	249 ms	67420 KiB

cigle

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = 5010;
int dp[N][N];
int D[N];

int main(){
    fastIO;
    int n;
    cin >> n;
    for(int i = 1; i <= n; i ++ ){
        cin >> D[i];
    }
    int pp;
    int cum;
    int cur;
    int outp = 0;

    int dpe;
    int val;
    int cur_v;
    int total;
    for(int cut = 2; cut <= n; cut ++ ){
        for(int ash = 2; ash <= cut - 1; ash ++ ){
            dp[ash][cut - 1] = max(dp[ash][cut - 1], dp[ash-1][cut-1]);
        }
        cur = 0;
        cum = 0;
        pp = cut;

        dpe = cut - 1;
        total = 0;
        cur_v = 0;
        for(int go = cut; go <= n; go ++ ){
            dp[cut][go] = dp[dpe][cut - 1] + cur_v;
            if(go == n)
                outp = max(outp, dp[cut][go]);

            cur += D[go];
            while(pp > 1 && cum < cur){
                pp --;
                cum += D[pp];
            }
            if(cum == cur){
                total ++ ;
                if(pp - 1 >= dpe){
                    cur_v ++ ;
                }
                else{
                    if(pp - 1 >= 1 && dp[pp - 1][cut - 1] + total >= dp[dpe][cut - 1] + cur_v){
                        cur_v = total;
                        dpe = pp - 1;
                    }
                }
            }
        }
    }
    cout << outp << "\n";
    return 0;
}

Compilation message (stderr)

cigle.cpp: In function 'int main()':
cigle.cpp:30:9: warning: unused variable 'val' [-Wunused-variable]
   30 |     int val;
      |         ^~~

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 13 / 13
• Subtask 4: 15 / 15
• Subtask 5: 52 / 52