Submission #1277713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1277713		sasde	Collecting Stamps 3 (JOI20_ho_t3)	C++20	100 / 100	84 ms	68888 KiB

ho_t3

#include<bits/stdc++.h>
using namespace std;
bool M1;
#define PI 3.14159265358979323846
#define sz(a) (int)a.size()
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
#define look_memory cerr<<abs(&M2-&M1)/1024.0/1024<<'\n'
#define look_time   cerr << "TIME : " << clock() * 0.001 << "s" <<'\n'
const int N=2e2+5,lg=30,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
int dx[]={1,0,-1,0,1,1,-1,-1};
int dy[]={0,-1,0,1,1,-1,1,-1};
int node,l,x[N],t[N];
int dp[N][N][N][2];
int kc(int u,int v){
    return min(l-abs(x[u]-x[v]),abs(x[u]-x[v]));
}
bool M2;
void solve(){
    cin >> node >> l;
    for(int i=1;i<=node;++i)cin >> x[i];
    for(int i=1;i<=node;++i)cin >> t[i];
    memset(dp,0x3f,sizeof dp);
    dp[0][node+1][0][0]=0;
    int ans=0;
    queue<tuple<int,int,int,int>>p;
    p.em(0,node+1,0,0);
    while(!p.empty()){
        auto [l,r,i,huong]=p.front();
        // cout <<w<<" "<<l<<" "<<r<<" "<<i<<" "<<huong<<'\n';
        p.pop();
        ans=max(ans,i);
        if(l+1<r)
        {
            int val=dp[l][r][i][huong]+(huong==0?kc(l,l+1):kc(r,l+1));
            int newi=i+(val<=t[l+1]);
            if(dp[l+1][r][newi][0]>val){
               dp[l+1][r][newi][0]=val;
               p.em(l+1,r,newi,0);
            }
        }
        if(l<r-1)
        {
            int val=dp[l][r][i][huong]+(huong==0?kc(l,r-1):kc(r,r-1));
            int newi=i+(val<=t[r-1]);
            if(dp[l][r-1][newi][1]>val){
               dp[l][r-1][newi][1]=val;
               p.em(l,r-1,newi,1);
            }
        }
    }
    cout << ans;
}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #define task "aws"
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();cout<<'\n';
}
look_memory;
look_time;
}

Compilation message (stderr)

ho_t3.cpp:72:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   72 | main()
      | ^~~~
ho_t3.cpp: In function 'int main()':
ho_t3.cpp:80:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
ho_t3.cpp:81:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75