Submission #375792

#	Time	Username	Problem	Language	Result	Execution time	Memory
375792		daniel920712	Two Dishes (JOI19_dishes)	C++14	0 / 100	241 ms	61056 KiB

dishes

#include <iostream>
#include <stdio.h>
#include <stdlib.h>

using namespace std;
long long all1[1000005],Time1[1000005],how1[1000005];
long long all2[1000005],Time2[1000005],how2[1000005];
long long pre1[1000005]={0};
long long pre2[1000005]={0};
bool have[2005][2005];
long long DP[2005][2005]={0};
long long N,M;
long long F(long long x,long long y)
{
    long long a=0,b=0;
    if(x==N&&y==M) return 0;
    if(have[x][y]) return DP[x][y];

    have[x][y]=1;
    if(x==N) DP[x][y]=F(x,y+1)+((pre1[x]+pre2[y+1])<=Time2[y])*how2[y];
    else if(y==M) DP[x][y]=F(x+1,y)+((pre1[x+1]+pre2[y])<=Time1[x])*how1[x];
    else
    {
        a=F(x,y+1)+((pre1[x]+pre2[y+1])<=Time2[y])*how2[y];
        b=F(x+1,y)+((pre1[x+1]+pre2[y])<=Time1[x])*how1[x];
        DP[x][y]=max(a,b);
    }
    //printf("%lld %lld %lld\n",x,y,DP[x][y]);
    return DP[x][y];
}
int main()
{
    long long ans=-1e18,i;
    scanf("%lld %lld",&N,&M);
    for(i=0;i<N;i++)
    {
        scanf("%lld %lld %lld",&all1[i],&Time1[i],&how1[i]);
        pre1[i+1]+=all1[i];
    }
    for(i=0;i<M;i++)
    {
        scanf("%lld %lld %lld",&all2[i],&Time2[i],&how2[i]);
        pre2[i+1]+=all2[i];
    }
    printf("%lld\n",F(0,0));
    return 0;
}

Compilation message (stderr)

dishes.cpp: In function 'int main()':
dishes.cpp:33:15: warning: unused variable 'ans' [-Wunused-variable]
   33 |     long long ans=-1e18,i;
      |               ^~~
dishes.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     scanf("%lld %lld",&N,&M);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
dishes.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |         scanf("%lld %lld %lld",&all1[i],&Time1[i],&how1[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dishes.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |         scanf("%lld %lld %lld",&all2[i],&Time2[i],&how2[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 3
• Subtask 3: 0 / 7
• Subtask 4: 0 / 39
• Subtask 5: 0 / 11
• Subtask 6: 0 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9