Submission #357660

#	Time	Username	Problem	Language	Result	Execution time	Memory
357660		nicolaalexandra	Round words (IZhO13_rowords)	C++14	24 / 100	100 ms	32876 KiB

rowords

#include <bits/stdc++.h>
#define DIM 2010
using namespace std;

char a[DIM],b[DIM],a2[DIM],b2[DIM];
int dp[DIM][DIM];
int n,m,i,j,sol;

void solve (char a[], char b[]){

    memset (dp,0,sizeof dp);

    for (i=1;i<=n;i++)
        for (j=1;j<=m;j++){
            dp[i][j] = max (dp[i-1][j],dp[i][j-1]);
            if (a[i] == b[j])
                dp[i][j] = max (dp[i][j],dp[i-1][j-1] + 1);
        }

    for (int poz=1;poz<=n;poz++){

        int i = poz, j = m, cnt = 0;
        while (i > max(0,poz - n/2) && j >= 1){
            if (a[i] == b[j]){
                cnt++;
                i--, j--;
            } else {
                if (dp[i][j-1] >= dp[i-1][j])
                    j--;
                else i--;
            }
        }
        sol = max (sol,cnt);
    }
}

int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>a+1>>b+1;
    n = strlen (a+1), m = strlen (b+1);

    for (i=1;i<=n;i++)
        a2[n-i+1] = a[i];
    for (i=1;i<=m;i++)
        b2[m-i+1] = b[i];

    for (i=1;i<=n;i++)
        a[i+n] = a[i];
    n *= 2;
    solve (a,b);
    solve (a,b2);

    for (i=1;i<=n/2;i++)
        a2[i+n/2] = a2[i];
    solve (a2,b);

    cout<<sol;


    return 0;
}

Compilation message (stderr)

rowords.cpp: In function 'int main()':
rowords.cpp:42:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |     cin>>a+1>>b+1;
      |          ~^~
rowords.cpp:42:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |     cin>>a+1>>b+1;
      |               ~^~

• Subtask 1: 24 / 100