Submission #1542297

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll qmul(ll a,ll b)//O(1) 二分乘法
{
    ll ret = 0, k=a, sig = 1;
    if(k<0)
    {
        sig=-1;
        k=-k;
    }
    if(b<0)
    {
        sig*=-1 ;
        b=-b;
    }
    while(b)
    {
        if(b&1)
            ret=(ret+k);
        k=(k+k);
        b>>=1;
    }
    return ret*sig;
}
int main()
{
    ll Q, H, S, D, N;
    scanf("%lld%lld%lld%lld%lld", &Q, &H, &S, &D, &N);
    ll a[] = {Q*4,H*2,S};
    ll b[] = {Q*8,H*4,S*2,D};
    sort(a,a+3);sort(b,b+4);
    //ll ans = b[0] * (N / 2);
    ll ans = qmul(b[0],N/2);
    return !printf("%lld\n",N&1?ans+a[0]:ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:29:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld%lld%lld%lld", &Q, &H, &S, &D, &N);
                                                      ^

Judge Result