#include "homecoming.h"
#include<iostream>
#include<vector>
#define int long long
using namespace std;
const int N=2e6+2;
const int inf=1e18+2;
int dp[N][2][2],sum[N],sum1[N]; //co chon khong , loai nao
long long solve(int N,int K,int* A,int* B){
int i;
for(i=0;i<N;i++){
sum[i]=B[i];
if(i){
sum[i]+=sum[i-1];
}
dp[i][0][0]=-inf;
dp[i][1][0]=-inf;
dp[i][0][1]=-inf;
dp[i][1][1]=-inf;
}
dp[0][0][0]=0;
dp[0][1][1]=A[0]-sum[K-1];
// cout<<dp[0][1][1]<<endl;
for(i=1;i<N;i++){
dp[i][0][0]=max(dp[i-1][0][0],dp[i-1][1][0]);
dp[i][0][1]=max(dp[i-1][0][1],dp[i-1][1][1]);
if(i+K-1<N){
dp[i][1][0]=min(dp[i-1][1][0]+A[i]-B[i+K-1],dp[i-1][0][0]+A[i]-(sum[i+K-1]-sum[i-1]));
dp[i][1][1]=max(dp[i-1][1][1]+A[i]-B[i+K-1],dp[i-1][0][1]+A[i]-sum[i+K-1]+sum[i-1]);
}
else{
dp[i][1][0]=min(dp[i-1][1][0]+A[i]-B[i+K-1-N],dp[i-1][0][0]+A[i]-sum[i+K-1-N]-sum[N-1]+sum[i-1]);
dp[i][1][1]=max(dp[i-1][1][1]+A[i],dp[i-1][0][1]+A[i]-sum[N-1]+sum[i-1]);
}
//cout<<dp[i][1][1]<<endl;
}
//cout<<dp[n-1][1][1]<<endl;
return max(max(dp[N-1][0][1],dp[N-1][1][0]),max(dp[N-1][1][1],dp[N-1][0][1]));
}
//signed main(){
// cout<<solve(3,2,[40, 80, 100],[140, 0, 20]);
//}
Compilation message
/tmp/ccpj1Tdz.o: In function `main':
grader.cpp:(.text.startup+0xff): undefined reference to `solve(int, int, int*, int*)'
collect2: error: ld returned 1 exit status
