Submission #579797

#TimeUsernameProblemLanguageResultExecution timeMemory
579797Omar_ElgedawyCollecting Stamps 3 (JOI20_ho_t3)C++14
100 / 100
63 ms66080 KiB
#include <bits/stdc++.h> using namespace std; #define cin(vec) for(auto& i : vec) cin >> i #define cout(vec) for(auto& i : vec) cout << i << " "; cout << "\n"; #define fast ios::sync_with_stdio(0);cin.tie(0); #define loop(i,a,b) for (int i = a; i < b; i++) #define F first #define S second #define pb(n) push_back(n) #define pf(n) push_front(n) #define dci(d) fixed<<setprecision(d) #define sp ' ' #define el '\n' #define all(v) v.begin(),v.end() #define int long long int dx[8]= {0,0,1,-1,-1,1,1,-1}; int dy[8]= {-1,1,0,0,-1,1,-1,1}; int const N=1e4+5,M=1e3+1,Mod=1e9+7; int a[202],t[202],n,len; int dp[202][202][202][2]; int dist(int t1,int t2,int i,int j){ if(t2==0){ if(t1==0) return (a[i]-a[i-1]); else return (len-a[j]+a[i-1]); } else{ if(t1==1) return (a[j+1]-a[j]); else return (a[i]+len-a[j+1]); } } void testcase(int h){ cin>>n>>len; int mx=0; for(int i=1;i<=n;i++)cin>>a[i]; for(int i=1;i<=n;i++)cin>>t[i]; for(int i=0;i<=n+1;i++){ for(int j=n+1;j>=i;j--){ for(int t=0;t<=1;t++){ for(int cnt=1;cnt<=n+1;cnt++){ dp[i][j][cnt][t]=1e18; } } } } a[n+1]=len; for(int i=1;i<=n;i++){ for(int j=n;j>=i;j--){ for(int cnt=0;cnt<=n;cnt++){ for(int tp=0;tp<=1;tp++){ dp[i][j][cnt][tp]=min(dp[i-1][j][cnt][0]+dist(tp,0,i,j) ,dp[i][j+1][cnt][1]+dist(tp,1,i,j)); if(cnt){ int a=min(dp[i][j+1][cnt-1][1]+dist(tp,1,i,j) ,dp[i-1][j][cnt-1][0]+dist(tp,0,i,j)); if((!tp&&a<=t[i])||(tp&&a<=t[j])){ dp[i][j][cnt][tp]=min(dp[i][j][cnt][tp],a); mx=max(mx,cnt); } } } } } } cout<<mx; } int32_t main() { // fast testcase(1); // int tc;cin>>tc;for(int i=1;i<=tc;i++)testcase(i); return 0; }
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