이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
using namespace std;
long long res[64750];
int main () {
for(int i = 0;i<64750;i++)res[i]=-1e18;
res[0]=0;
long long m, l;
cin >> m >> l;
long long a[2*m+1];
for(int i = 0;i<=2*m;i++) {
cin >> a[i];
}
if(l<0) {
l=-l;
reverse(a,a+2*m+1);
}
if(l>=64750) {
cout << "impossible\n";
return 0;
}
for(int i = m+1;i<=2*m;i++) {
for(int cnt=1;cnt<=a[i];cnt++) {
for(int j = 64750-1;j>=(i-m);j--) {
res[j]=max(res[j], res[j-(i-m)]+1);
}
}
}
for(int i = 0;i<=m-1;i++) {
for(int cnt=1;cnt<=a[i];cnt++) {
for(int j = 0;j<64750;j++) {
if((j-(i-m))<64750)res[j]=max(res[j], res[j-(i-m)]+1);
}
}
}
res[l]+=a[m];
if(res[l]<0)cout<<"impossible\n";
else cout << (res[l]) << "\n";
}
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