Submission #427933

#	Time	Username	Problem	Language	Result	Execution time	Memory
427933		Amylopectin	Knapsack (NOI18_knapsack)	C++14	100 / 100	679 ms	2500 KiB

knapsack

#include <iostream>
#include <stdio.h>
using namespace std;
const int mxn = 1e5 + 10;
long long ta[mxn] = {},nru[mxn] = {},chc[mxn] = {};
long long fima(long long l,long long r)
{
    if(l > r)
        return l;
    return r;
}
int main()
{
    long long i,j,n,m,cva,cwe,cco,cma = 0,k;
    scanf("%lld %lld",&m,&n);
    for(i=0; i<n; i++)
    {
        scanf("%lld %lld %lld",&cva,&cwe,&cco);
        for(j=0; j<cwe; j++)
        {
            nru[j] = ta[j];
        }
        for(j=cwe; j<=m; j++)
        {
            if(chc[j-cwe] == cco)
            {
//                nru[j] = fima(ta[j-(cco * cwe)] + (cco * cva), ta[j]);
                nru[j] = ta[j];
                for(k=1; k<=cco; k++)
                {
                    if(ta[j-(k*cwe)] + (k*cva) > nru[j])
                    {
                        nru[j] = ta[j-(k*cwe)] + (k*cva);
                        chc[j] = k;
                    }
                }
//                if(ta[j-(cco * cwe)] + (cco * cva) > ta[j])
//                {
//                    nru[j] = ta[j-(cco * cwe)] + (cco * cva);
//                    chc[j] = cco;
//                }
//                else
//                {
//                    nru[j] = ta[j];
//                }
//                chc[j] = cco;
            }
            else
            {
//                nru[j] = fima(, ta[j]);
                if(nru[j-cwe] + cva > ta[j])
                {
//                    if(j-cwe < cwe)
//                    {
//                        nru[j] = ta[j-cwe] + cva;
//                    }
//                    else
//                    {
                        nru[j] = nru[j-cwe] + cva;
//                    }
                    chc[j] = chc[j-cwe] + 1;
                }
                else
                {
                    nru[j] = ta[j];
                }
            }
        }
        for(j=cwe; j<=m; j++)
        {
            chc[j] = 0;
            ta[j] = fima(nru[j],ta[j]);
            nru[j] = 0;
        }
    }
    for(i=0; i<=m; i++)
    {
        cma = fima(cma,ta[i]);
    }
    printf("%lld\n",cma);
    return 0;
}

Compilation message (stderr)

knapsack.cpp: In function 'int main()':
knapsack.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     scanf("%lld %lld",&m,&n);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
knapsack.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%lld %lld %lld",&cva,&cwe,&cco);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27