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Submission #476546

# Submission time Handle Problem Language Result Execution time Memory
476546 2021-09-27T14:56:27 Z hackerbhaiya Round words (IZhO13_rowords) C++14
100 / 100
 112 ms 21964 KB 
#include<bits/stdc++.h>
// #pragma GCC optimize("Ofast")
// #pragma GCC target("avx,avx2,fma")
// #pragma GCC optimization("unroll-loops")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC optimize("no-stack-protector")
// #define ll __int128
#define ll long long
// #define ll int
#define f(i,a,b) for(int i=a;i<b;i++)
#define mod 1000000007
// #define mod 998244353 
#define mp make_pair
#define uniq(v) (v).erase(unique(all(v)),(v).end())
#define ff first
#define ss second
#define rf(i,a,b) for(int i=a;i>=b;i--)
#define sc(a) scanf("%lld",&a)
#define pf printf
#define sz(a) (int)(a.size())
#define psf push_front
#define ppf pop_front
#define ppb pop_back
#define pb push_back
#define pq priority_queue
#define all(s) s.begin(),s.end()
#define sp(a) setprecision(a)
#define rz resize
#define ld long double
#define inf (ll)1e18
#define ub upper_bound
#define lb lower_bound
#define bs binary_search
#define eb emplace_back
const double pi = acos(-1);
ll binpow(ll a, ll b){ll res=1;while(b!=0){if(b&1)res*=a;a*=a;b>>=1;}return res;}
// ll binpow(ll a, ll b, ll md){ll res=1;a%=mod;while(b!=0){if(b&1)res*=a,res%=md;a*=a,a%=md;b>>=1;}return res%md;}
 
using namespace std;

vector<vector<int> > dp,dir;
string a,b;
int n,m;

void init()
{
    f(i,0,n)
    {
        f(j,0,m)
            dp[i][j]=dir[i][j]=0;
    }
    f(i,1,n)
    {
        f(j,1,m)
        {
            if(a[i]==b[j])
                dp[i][j]=1+dp[i-1][j-1],dir[i][j]=1;
            if(dp[i][j-1]>=dp[i-1][j] && dp[i][j]<=dp[i][j-1])
                dp[i][j]=dp[i][j-1],dir[i][j]=0;
            if(dp[i][j]<dp[i-1][j])
                dp[i][j]=dp[i-1][j],dir[i][j]=2;
        }
    }
}

int cal(int i, int j)
{
    int ans=0;
    while(i>0 && j>0)
    {
        if(i<0 || j<0)
            return ans;
        if(dir[i][j]==1)
            ans++,i--,j--;
        else if(dir[i][j]==0)
            j--;
        else
            i--;
    }
    return ans;
}

void update(int id)
{
    int i=id,j=1;
    while(j<m && dir[i][j]!=1)
        j++;
    if(j>=m)
        return;
    dir[i][j]=0;
    while(i<n-1 && j<m-1)
    {
        if(dir[i+1][j]==2)
            i++,dir[i][j]=0;
        else if(dir[i+1][j+1]==1)
            i++,j++,dir[i][j]=0;
        else
            j++;
    }
    while(i<n && j<m)
    {
        if(dir[i+1][j]==2)
            i++,dir[i][j]=0;
        else
            break;
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    // freopen("xortransform.in","r",stdin);
    // freopen("xortransform.out","w",stdout);
// #ifndef ONLINE_JUDGE
//     freopen("input.txt","r",stdin);
//     freopen("output.txt","w",stdout);
// #endif
    int z=1;
    // cin>>z;
    f(i,1,z+1)
    {
        //cout<<"Case #"<<i<<": ";
        cin>>a>>b;
        string tempa=a,tempb=b;
        int dif=sz(tempa);
        a="#"+tempa+tempa,b="$"+tempb;
        n=sz(a),m=sz(b);
        dp.rz(n,vector<int> (m)),dir.rz(n+1,vector<int> (m+1));
        init();
        int ans=cal(dif,m-1),cur=dif+1;
        f(i,2,n)
        {
            if(cur>=n)
                break;
            update(i-1);
            ans=max(ans,cal(cur,m-1)),cur++;
        }
        reverse(all(tempa));
        a="#"+tempa+tempa;
        init();
        ans=max(ans,cal(dif,m-1)),cur=dif+1;
        f(i,2,n)
        {
            if(cur>=n)
                break;
            update(i-1);
            ans=max(ans,cal(cur,m-1)),cur++;
        }
        cout<<ans<<"\n";
    }
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 10 ms 2048 KB Output is correct
7 Correct 28 ms 16148 KB Output is correct
8 Correct 83 ms 16076 KB Output is correct
9 Correct 92 ms 16132 KB Output is correct
10 Correct 83 ms 16128 KB Output is correct
11 Correct 82 ms 17720 KB Output is correct
12 Correct 65 ms 20652 KB Output is correct
13 Correct 110 ms 20660 KB Output is correct
14 Correct 84 ms 18424 KB Output is correct
15 Correct 97 ms 21964 KB Output is correct
16 Correct 106 ms 17776 KB Output is correct
17 Correct 69 ms 13528 KB Output is correct
18 Correct 103 ms 21048 KB Output is correct
19 Correct 69 ms 16076 KB Output is correct
20 Correct 112 ms 18840 KB Output is correct
21 Correct 36 ms 4556 KB Output is correct
22 Correct 53 ms 7628 KB Output is correct
23 Correct 85 ms 10516 KB Output is correct
24 Correct 69 ms 10980 KB Output is correct
25 Correct 96 ms 14796 KB Output is correct