이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <stdio.h>
#define MAXN 101101
#define MAXK 222
typedef long long ll;
int N, K;
int A[MAXN];
int S[MAXN];
void INPUT() {
scanf("%d %d", &N, &K);
for(int i=1; i<=N; i++) {
scanf("%d", &A[i]);
S[i]=S[i-1]+A[i];
}
}
long long D[2][MAXN];
int Mom[MAXK][MAXN];
long long Stack[3][MAXN];
int Stackp;
bool MyOperator(ll Linea[], ll Lineb[]) {
ll Line[3][2];
for(int i=0; i<3; i++) {
Line[i][0]=Linea[i];
Line[i][1]=Lineb[i];
}
ll temp1=(ll)(Line[0][1]-Line[1][1])*(ll)(Line[2][0]-Line[1][0]);
ll temp2=(ll)(Line[1][1]-Line[2][1])*(ll)(Line[1][0]-Line[0][0]);
return temp1>=temp2;
}
int C;
int P;
void Stack_Push(int k) {
++Stackp;
Stack[0][Stackp]=(ll)S[k];
Stack[1][Stackp]=-(ll)S[k]*(ll)S[k]+D[C%2][k];
Stack[2][Stackp]=k;
}
void Stack_Pop() {
// if(P==Stackp) P--;
Stackp--;
}
void Stack_Clear() {
Stackp=0;
}
void Graph(int k) {
if(Stackp==0) {
Stack_Push(k);
// printf("<<<<<%d %lld %lld>>>>>\n", k, Stack[0][Stackp], Stack[1][Stackp]);
return;
}
if(A[k]==0) return;
if(Stackp==1) {
Stack_Push(k);
// printf("<<<<<%d %lld %lld>>>>>\n", k, Stack[0][Stackp], Stack[1][Stackp]);
return;
}
Stack_Push(k);
// printf("<<<<<%d %lld %lld>>>>>\n", k, Stack[0][Stackp], Stack[1][Stackp]);
// printf(".%lld\t %lld\t %lld\n", Stack[0][Stackp-2], Stack[0][Stackp-1], Stack[0][Stackp]);
// printf(".%lld\t %lld\t %lld\n", Stack[1][Stackp-2], Stack[1][Stackp-1], Stack[1][Stackp]);
while(MyOperator(Stack[0]+Stackp-2, Stack[1]+Stackp-2)) {
Stack_Pop();
Stack_Pop();
Stack_Push(k);
if(Stackp<=2) break;
}
}
ll MAX(ll x, ll y) {
if(x>y) return x;
else return y;
}
void Find(int i, int j);
void PROCESS() {
// Trick();
for(int i=1; i<=K; i++) {
for(int j=i+1; j<=N; j++) D[i%2][j]=0;
C=i-1;
Stack_Clear();
P=1;
for(int j=i+1; j<=N; j++) {
Graph(j-1);
while(1) {
if(P>=Stackp) break;
ll nowa =Stack[0][P] , nowb =Stack[1][P];
ll nexta=Stack[0][P+1] , nextb=Stack[1][P+1];
ll nowD=nowa*(ll)S[j]+nowb, nextD=nexta*(ll)S[j]+nextb;
// printf("<%d (%lld %lld) %lld (%lld %lld) %lld : %d>\n"
// , k, nowa, nowb, nowD, nexta, nextb, nextD, S[j]);
if(nowD<=nextD) P++;
else break;
}
if(P>=Stackp) P=Stackp;
ll Da =Stack[0][P] , Db =Stack[1][P];
D[i%2][j]=Da*(ll)S[j]+Db;
Mom[i][j]=Stack[2][P];
// printf("%d %d : %lld %lld / %lld (%d %d / %d)\n"
// , i, j, Da, Db, D[i%2][j], k, Stackp, Stack[2][k]);
/*
for(int k=i; k<j; k++) {
ll temp=D[1-i%2][k]-((ll)S[k]*(ll)S[k])+(ll)S[j]*(ll)S[k];
D[i%2][j]=MAX(D[i%2][j], temp);
if(D[i%2][j]==temp) Mom[i][j]=k;
}
printf("%d %d / %lld %d\n"
, i, j, D[i%2][j], Mom[i][j]);
*/
}
}
long long Ans=0;
int p=N;
Ans=MAX(Ans, D[K%2][N]);
printf("%lld\n", Ans);
Find(K, p);
}
void Find(int i, int j) {
if(i==0) return;
printf("%d ", Mom[i][j]);
return Find(i-1, Mom[i][j]);
}
int main() {
INPUT();
PROCESS();
}
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