Submission #1073032

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073032		KasymK	Split the sequence (APIO14_sequence)	C++17	0 / 100	1 ms	348 KiB

sequence

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second   
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 1005;
const int K = 205;
int v[N], par[N], id[N][K];
ll dp[N][K];

int main(){
    freopen("file.txt",  "r", stdin);
    int n, k;
    scanf("%d%d", &n, &k);
    for(int i = 1; i <= n; ++i){
        int x;
        scanf("%d", &x);
        v[i] = x;
    }
    for(int i = 1; i <= n; ++i)
        par[i] = par[i-1]+v[i];
    for(int i = 1; i <= n; ++i)
        for(int j = 0; j < i; ++j)
            for(int x = 1; x <= min(k, i); ++x)
                if(umax(dp[i][x], dp[j][x-1]+(par[i]-par[j])*(par[n]-par[i])))
                    id[i][x] = j;
    ll answer = 0;
    for(int i = 1; i <= n; ++i)
        umax(answer, dp[i][k]);
    int d = 0, x = k;
    for(int i = 1; i <= n; ++i)
        if(dp[i][k] == answer){
            d = i;
            break;
        }
    vector<int> A;
    while(x){
        A.pb(d);
        d = id[d][x];
        --x;
    }
    printf("%lld\n", answer);
    for(int i = k-1; i >= 0; --i)
        printf("%d ", A[i]);
    puts("");
    return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("file.txt",  "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
sequence.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29