Submission #10098

#	Time	Username	Problem	Language	Result	Execution time	Memory
10098		sutekine	On grid (kriii2_O)	C++98	1 / 4	1000 ms	2216 KiB

O

#include <cstdio>
#include <algorithm>
#include <cstring>
#define oo 987654321

int R, C, A[311][311], S[311][311], DT[310][310];

int f(int a, int b)
{
    int ans = -oo;
    if( a == R+1 && b == C+1 ) return 0;
    if( a == R+1 || b == C+1 ) return -oo;
    if( DT[a][b] == -1 )
    {
        for(int i = a ; i <= R ; i++ ) for( int j = b ; j <= C ; j++ )
            ans = std::max( ans, S[i][j] - S[a-1][j] - S[i][b-1] + S[a-1][b-1] + f(i+1, j+1) );
        DT[a][b] = ans;
    }
    return DT[a][b];
}

int main()
{
    memset(DT, -1, sizeof(DT));
    scanf("%d%d",&R,&C);
    for(int i = 1 ; i <= R ; i++ ) for(int j = 1 ; j <= C ; j++ )
        scanf("%d", &A[i][j]);
    for(int i = 1 ; i <= R ; i++ ) for(int j = 1 ; j <= C ; j++ )
        if( i == 1 && j == 1 ) S[i][j] = A[i][j];
        else S[i][j] = S[i-1][j] + S[i][j-1] - S[i-1][j-1] + A[i][j];
    printf("%d", f(1,1));
    return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 0 / 3