Submission #1089852

#	Time	Username	Problem	Language	Result	Execution time	Memory
1089852		KALARRY	Tricks of the Trade (CEOI23_trade)	C++14	5 / 100	42 ms	11348 KiB

trade

//chockolateman

#include<bits/stdc++.h>

using namespace std;

long long N,K,a[250005],b[250005],dp[250005][2];

int main()
{
    scanf("%lld%lld",&N,&K);
    for(long long i = 1 ; i <= N ; i++)
        scanf("%lld",&a[i]);
    for(long long i = 1 ; i <= N ; i++)
        scanf("%lld",&b[i]);
    for(long long j = 1 ; j <= K ; j++)
        dp[0][j%2] = -1e9;
    for(long long j = 1 ; j <= K ; j++)
    {
        for(long long i = 1 ; i <= N ; i++)
            dp[i][j%2] = max(dp[i-1][j%2] - a[i],dp[i-1][(j-1)%2] + b[i] - a[i]);
    }
    long long ans = -1e9;
    for(long long i = 1 ; i <= N ; i++)
        ans = max(ans,dp[i][K%2]);
    printf("%lld\n",ans);
    return 0;
}

Compilation message (stderr)

trade.cpp: In function 'int main()':
trade.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%lld%lld",&N,&K);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
trade.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf("%lld",&a[i]);
      |         ~~~~~^~~~~~~~~~~~~~
trade.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%lld",&b[i]);
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 5 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45