Submission #356833

#	Time	Username	Problem	Language	Result	Execution time	Memory
356833		nicolaalexandra	Round words (IZhO13_rowords)	C++14	4 / 100	48 ms	16952 KiB

rowords

#include <bits/stdc++.h>
#define DIM 1010
using namespace std;

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

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

    memset (dp_left,0,sizeof dp_left);
    memset (dp_right,0,sizeof dp_right);

    dp_left[0][0] = 1;
    for (i=1;i<=n;i++)
        for (j=1;j<=m;j++){
            dp_left[i][j] = max (dp_left[i-1][j],dp_left[i][j-1]);
            if (a[i] == b[j])
                dp_left[i][j] = max (dp_left[i][j],dp_left[i-1][j-1] + 1);
        }

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

    for (i=1;i<=n+1;i++)
        for (j=1;j<=m+1;j++)
            sol = max (sol,dp_right[i][j] + dp_left[i-1][j-1]);

}

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];

    solve (a,b);
    solve (a,b2);
    solve (a2,b);
    solve (a2,b2);

    cout<<sol;


    return 0;
}

Compilation message (stderr)

rowords.cpp: In function 'int main()':
rowords.cpp:41:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |     cin>>a+1>>b+1;
      |          ~^~
rowords.cpp:41:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |     cin>>a+1>>b+1;
      |               ~^~

• Subtask 1: 4 / 100