【DP】捡苹果

#include<stdio.h>

int max(int a,int b)
{
    int c;
    if(a>b)
        c=a;
    else
        c=b;

    return c;
    }

int main()
{
    FILE *fin,*fout;
    int a[][],i,j;

    fin=fopen("in.txt","r");
    fout=fopen("out.txt","w");

    for(i=;i<=;i++)
        for(j=;j<=;j++)
            a[i][j]=;

    for(i=;i<=;i++)
        for(j=;j<=i;j++)
            fscanf(fin,"%d",&a[i][j]);

    for(;i>=;i--)
        for(j=;j<=i;j++)
            a[i][j]=max(a[i-][j],a[i-][j+]);

    fprintf(fout,"%d\n",a[][]);

    fclose(fin);
    fclose(fout);
    getchar();
    getchar();
    return ;
}