Submission #12160

#	Time	Username	Problem	Language	Result	Execution time	Memory
12160		xhae	Min-cost GCD (GA9_mcg)	C++14	Compilation error	0 ms	0 KiB

mcg

#include <unordered_map>
#include <cstdio>
#include <algorithm>
#include <boost/functional/hash.hpp>
 
using namespace std;
 
/*
template <>
struct hash<pair<long long, long long> > {
public:
        size_t operator()(pair<long long, long long> x) const throw() {
             size_t h = (x.first << 32) | ((x.second << 32) >> 32);
             return h;
        }
};
*/
unordered_map<pair<long long, long long>, long long, hash<pair<long long, long long>>> dp;
 
long long a, b, p, q;
const long long INF = 1000000ll * 1000000ll * 500000ll;
 
long long getAns(long long a, long long b)
{
    if(a == 0 || b == 0) return 0;
 
    pair<long long, long long> cur = make_pair(a, b);
    if(dp.count(cur)) return dp[cur];
     
    long long ret = p + getAns(b, a % b);
 
    if(a >= b)
    {
        long long howMany = a / b;
        if(howMany <= ret / (double)q)
        {
            long long cand = howMany * q + getAns(a % b, b);
            ret = min(cand, ret);
        }
    }
    else
    {
        long long howMany = b / a;
        if(howMany <= ret / (double)q)
        {
            long long cand = howMany * q + getAns(a, b % a);
            ret = min(cand, ret);
        }
    }
 
    return dp[cur] = ret;
}
 
int main(void)
{
    int T;
    scanf("%d", &T);
    while(T--)
    {
        scanf("%lld %lld %lld %lld", &a, &b, &p, &q);
        dp.clear();
        printf("%lld\n", getAns(a, b));
    }
 
    return 0;
}

Compilation message (stderr)

mcg.cpp:4:37: fatal error: boost/functional/hash.hpp: 그런 파일이나 디렉터리가 없습니다
 #include <boost/functional/hash.hpp>
                                     ^
compilation terminated.