Submission #201591

#TimeUsernameProblemLanguageResultExecution timeMemory
201591MvCCollecting Stamps 3 (JOI20_ho_t3)C++14
100 / 100
161 ms128888 KiB
#pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #define rc(x) return cout<<x<<endl,0 #define pb push_back #define mkp make_pair #define in insert #define er erase #define fd find #define fr first #define sc second typedef long long ll; typedef long double ld; const ll INF=0x3f3f3f3f3f3f3f3f; const ll llinf=(1LL<<62); const int inf=(1<<30); const int nmax=2e2+2; const int mod=1e9+7; using namespace std; int i,j,k,p,rs,n; ll t[nmax],r[nmax],a[nmax],b[nmax],f[nmax][nmax][nmax][2],l; ll d1(int i,int j) { return a[j]-a[i]; } ll d2(int i,int j) { return b[j]-b[i]; } void upd(ll &x,ll y,ll z) { if(y>=llinf)return; x=min(x,y+z); } void upd1(ll &x,ll y,ll z,ll p,ll tt) { if(y>=llinf)return; if(y+z<=tt)x=min(x,y+z+p); } int main() { //freopen("sol.in","r",stdin); //freopen("sol.out","w",stdout); //mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0); cin>>n>>l; for(i=1;i<=n;i++) { cin>>a[i]; b[n-i+1]=l-a[i]; } for(i=1;i<=n;i++) { cin>>t[i]; r[n-i+1]=t[i]; } for(i=0;i<=n;i++)for(j=0;j<=n;j++)for(k=0;k<=n;k++)for(p=0;p<2;p++)f[i][j][k][p]=llinf; f[0][0][0][0]=f[0][0][0][1]=0; for(i=0;i<=n;i++) { for(j=0;j<=n-i;j++) { for(k=0;k<=i+j;k++) { if(!i && !j)continue; if(j)upd(f[i][j][k][0],f[i][j-1][k][1],d1(0,i)+d2(j-1,j)+d2(0,j)); if(j)upd(f[i][j][k][0],f[i][j-1][k][0],d1(0,i)+d1(0,i)+d2(0,j)+d2(0,j)); if(i)upd(f[i][j][k][0],f[i-1][j][k][1],d2(0,j)+d1(0,i)); if(i)upd(f[i][j][k][0],f[i-1][j][k][0],d1(i-1,i)); if(j && k)upd1(f[i][j][k][0],f[i][j-1][k-1][1],d2(j-1,j),d1(0,i)+d2(0,j),r[j]); if(j && k)upd1(f[i][j][k][0],f[i][j-1][k-1][0],d1(0,i)+d2(0,j),d1(0,i)+d2(0,j),r[j]); if(i && k)upd1(f[i][j][k][0],f[i-1][j][k-1][1],d2(0,j)+d1(0,i),0,t[i]); if(i && k)upd1(f[i][j][k][0],f[i-1][j][k-1][0],d1(i-1,i),0,t[i]); if(j)upd(f[i][j][k][1],f[i][j-1][k][1],d2(j-1,j)); if(j)upd(f[i][j][k][1],f[i][j-1][k][0],d1(0,i)+d2(0,j)); if(i)upd(f[i][j][k][1],f[i-1][j][k][1],d2(0,j)+d1(0,i)+d1(0,i)+d2(0,j)); if(i)upd(f[i][j][k][1],f[i-1][j][k][0],d1(i-1,i)+d1(0,i)+d2(0,j)); if(j && k)upd1(f[i][j][k][1],f[i][j-1][k-1][1],d2(j-1,j),0,r[j]); if(j && k)upd1(f[i][j][k][1],f[i][j-1][k-1][0],d1(0,i)+d2(0,j),0,r[j]); if(i && k)upd1(f[i][j][k][1],f[i-1][j][k-1][1],d2(0,j)+d1(0,i),d2(0,j)+d1(0,i),t[i]); if(i && k)upd1(f[i][j][k][1],f[i-1][j][k-1][0],d1(i-1,i),d1(0,i)+d2(0,j),t[i]); if(f[i][j][k][0]!=llinf || f[i][j][k][1]!=llinf)rs=max(rs,k); } } } cout<<rs<<endl; return 0; }
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