This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
typedef long long lint;
typedef long double ldb;
typedef unsigned long long uli;
#define X first
#define Y second
#define F(i, l, r) for(int i = l; i != r; i++)
#define Df(i, l, r) for(int i = l; i != r; i--)
#define I(i, a) for(auto i : a)
#define pb push_back
#define rs resize
#define mk make_pair
#define asg assign
#define all(x) x.begin(),x.end()
#define ret return
#define cont continue
#define brk break
#define ins insert
#define era erase
#define fi0(x) memset(x, 0, sizeof(x))
#define finf(x) memset(x, 127, sizeof(x))
#define acpy(y, x) memcpy(y, x, sizeof(y))
#define y1 adjf
#define tm dhgdg
const int MAXN = 1e3 + 3;
const int MAXK = 2e2 + 2;
lint dp[MAXN][MAXK];
int pr[MAXN][MAXK];
int a[MAXN];
int ptr[MAXN];
int pref[MAXN];
int n, k;
void restore(int i, int j){
if(i < 0)ret;
printf("%d ", i + 1);
restore(pr[i][j], j - 1);
}
lint f(int j, int pi, int i){
ret dp[pi][j] + pref[pi] * 1ll * (pref[i] - pref[pi]);
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
scanf("%d%d", &n, &k);
F(i, 0, n)scanf("%d", &a[i]);
F(i, 0, n)pref[i] = a[i] + ((i == 0) ? 0 : pref[i - 1]);
k++;
F(i, 0, n)
F(j, 1, k + 1)
pr[i][j] = -2;
dp[0][1] = 0;
pr[0][1] = -1;
fi0(ptr);
F(i, 1, n){
dp[i][1] = 0;
pr[i][1] = -1;
F(j, 2, k + 1){
while(ptr[j - 1] < i - 1 && (pr[ptr[j - 1]][j - 1] == -2 || f(j - 1, ptr[j - 1], i) < f(j - 1, ptr[j - 1] + 1, i)))ptr[j - 1]++;
if(pr[ptr[j - 1]][j - 1] == -2)cont;
dp[i][j] = f(j - 1, ptr[j - 1], i);
pr[i][j] = ptr[j - 1];
}
}
printf("%lld\n", dp[n - 1][k]);
restore(pr[n - 1][k], k - 1);
ret 0;
}
Compilation message (stderr)
sequence.cpp: In function 'int main()':
sequence.cpp:52:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &k);
^
sequence.cpp:53:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
F(i, 0, n)scanf("%d", &a[i]);
^
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