Submission #12118

#	Time	Username	Problem	Language	Result	Execution time	Memory
12118		kriii	Min-cost GCD (GA9_mcg)	C++14	Compilation error	0 ms	0 KiB

mcg

#include <stdio.h>
#include <algorithm>
#include <hash_map>
using namespace std;

long long a,b,p,q,l;

std::hash_map<long long, long long> chk;

long long go(long long a, long long b)
{
	if (a == 0 || b == 0) return 0;
	if (a == b) return p < q ? p : q;
	long long h = a*b+a*3+b;
	long long &r = chk[h];
	if (r) return r;
	r = p + go(b,a%b);
	if (a > b){
		long long d = a / b, e = q * d;
		if (d <= l) r = min(r, e+go(a-b*d,b));
	}
	else{
		long long d = b / a, e = q * d;
		if (d <= l) r = min(r, e+go(a,b-a*d));
	}
	return r;
}

int main()
{
	int T; scanf ("%d",&T); while (T--){
		scanf ("%lld %lld %lld %lld",&a,&b,&p,&q);
		chk.clear(); l = 1e18 / q;
		printf ("%lld\n",go(a,b));
	}

	return 0;
}

Compilation message (stderr)

In file included from /usr/include/c++/4.9/backward/hash_map:60:0,
                 from mcg.cpp:3:
/usr/include/c++/4.9/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated. [-Wcpp]
 #warning \
  ^
mcg.cpp:8:6: error: ‘hash_map’ in namespace ‘std’ does not name a template type
 std::hash_map<long long, long long> chk;
      ^
mcg.cpp: In function ‘long long int go(long long int, long long int)’:
mcg.cpp:15:17: error: ‘chk’ was not declared in this scope
  long long &r = chk[h];
                 ^
mcg.cpp: In function ‘int main()’:
mcg.cpp:33:3: error: ‘chk’ was not declared in this scope
   chk.clear(); l = 1e18 / q;
   ^
mcg.cpp:31:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  int T; scanf ("%d",&T); while (T--){
                        ^
mcg.cpp:32:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%lld %lld %lld %lld",&a,&b,&p,&q);
                                            ^