Dynamic-Programming/VipulAndHisLoveForString(DP).cpp at master · robinrst/Dynamic-Programming · GitHub

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#include        "algorithm"
#include        "iostream"
#include        "numeric"
#include        "iomanip"
#include        "cstring"
#include        "math.h"
#include        "bitset"
#include        "string"
#include        "vector"
#include        "ctime"
#include        "queue"
#include        "stack"
#include        "map"
#include        "set"

#include        "ext/pb_ds/assoc_container.hpp" // Common file
#include        "ext/pb_ds/tree_policy.hpp" // Including tree_order_statistics_node_update
#include        "ext/pb_ds/detail/standard_policies.hpp"

using namespace std;
using namespace __gnu_pbds;


#define          f first
#define          lgn 25
#define          endl '\n'
#define          sc second
#define          pb push_back
#define          N (int) 1001
#define          PI acos(-1.0)
#define          int long long
#define          vi vector<int>
#define          mod 1000000007
#define          ld long double
#define          eb emplace_back
#define          mii map<int,int>
#define          vpii vector<pii>
#define          pii pair<int,int>
#define          pq priority_queue
#define          BLOCK (int)sqrt(N)
#define          test(x) while(x--)
#define          all(x) begin(x),end(x)
#define          allr(x) x.rbegin(),x.rend()
#define          fo(i,a,n) for(int i=a;i<n;i++)
#define          rfo(i,n,a) for(int i=n;i>=a;i--)
#define          FAST ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define          time() cerr << "Time : " << (double)clock() / (double)CLOCKS_PER_SEC << "s\n"
#define            bug(...)       __f (#__VA_ARGS__, __VA_ARGS__)

typedef tree< int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update >
OS ;

template <typename Arg1>
void __f (const char* name, Arg1&& arg1) { cout << name << " : " << arg1 << endl; }
template <typename Arg1, typename... Args>
void __f (const char* names, Arg1&& arg1, Args&&... args)
{
     const char* comma = strchr (names + 1, ',');
     cout.write (names, comma - names) << " : " << arg1 << " | "; __f (comma + 1, args...);
}

const int inf = 0x3f3f3f3f;
const int INF = 0x3f3f3f3f3f3f3f3f;

int n,m,k,q , nk;
string s ,t ;

int dp[N][N][11];
int len[N][N];

void go()
{
     cin >> n >> m >> nk;
     cin >> s >> t;

     s = " " + s;
     t = " " + t;

     for( int i = 1; i <= n; i++)
     {
          for( int j = 1; j <= m; j++)
          {
               if( s[i] == t[j] ) len[i][j] = 1 + len[i-1][j-1];
          }
     }

     for( int i = 1; i <= n; i++)
     {
          for( int j = 1; j <= m; j++)
          {
               for( int k = 1; k <= nk; k++)
               {
                    dp[i][j][k] = max({ dp[i][j][k] , dp[i-1][j][k] , dp[i][j-1][k] });

                    int now = len[i][j];

                    if( s[i] == t[j] )
                    {
                         dp[i][j][k] = max( dp[i][j][k] , now + dp[i - now][j - now][k-1] );
                    }
               }
          }
     }

     cout << dp[n][m][nk] << endl;
}

int32_t main()
{
     FAST;
     int t=1;
     // cin>>t;
     test(t) go();
}