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Submission #208344

# Submission time Handle Problem Language Result Execution time Memory
208344 2020-03-10T19:50:47 Z arnold518 timeismoney (balkan11_timeismoney) C++14
100 / 100
 523 ms 632 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 200;
const int MAXM = 1e4;
const ll INF = 1e18;

struct Edge
{
	int u, v; ll x, y;
};

int N, M;
Edge E[MAXM+10];
pair<ll, pll> ans={INF, {0, 0}};

struct Point { ll x, y; };
Point operator - (const Point &p, const Point &q) { return {p.x-q.x, p.y-q.y}; }
bool operator == (const Point &p, const Point &q) { return p.x==q.x && p.y==q.y; }

struct UF
{
	int par[MAXN+10];
	void init() { for(int i=0; i<=N; i++) par[i]=i; }
	int Find(int x) { return x==par[x] ? x : par[x]=Find(par[x]); }
	void Union(int x, int y) { x=Find(x); y=Find(y); par[x]=y; }
} uf;

Point f(ll a, ll b, bool print)
{
	int i, j;

	Point r={0, 0};
	sort(E+1, E+M+1, [&](const Edge &p, const Edge &q) { return p.x*b+p.y*a<q.x*b+q.y*a; });
	uf.init();

	for(i=1; i<=M; i++)
	{
		if(uf.Find(E[i].u)!=uf.Find(E[i].v))
		{
			if(print) printf("%d %d\n", E[i].u-1, E[i].v-1);
			uf.Union(E[i].u, E[i].v);
			r.x+=E[i].x;
			r.y+=E[i].y;
		}
	}
	return r;
}

void dnc(Point p, Point q)
{
	int i, j;
	if(p==q) return;

	ll a=q.x-p.x, b=p.y-q.y;
	Point r=f(a, b, 0);
	if(r.x*r.y<ans.first) ans={r.x*r.y, {a, b}};
	Point v1=p-r, v2=q-r;
	if(v1.x*v2.y-v1.y*v2.x==0) return;
	assert(v1.x*v2.y-v1.y*v2.x<0);
	dnc(p, r);
	dnc(r, q);
}

int main()
{
	int i, j;

	scanf("%d%d", &N, &M);
	for(i=1; i<=M; i++) scanf("%d%d%lld%lld", &E[i].u, &E[i].v, &E[i].x, &E[i].y), E[i].u++, E[i].v++;

	Point p=f(0, 1, 0), q=f(1, 0, 0);
	ans=min(ans, {p.x*p.y, {0, 1}});
	ans=min(ans, {q.x*q.y, {1, 0}});
	dnc(p, q);

	Point r=f(ans.second.first, ans.second.second, 0);
	printf("%lld %lld\n", r.x, r.y);
	f(ans.second.first, ans.second.second, 1);
}

Compilation message

timeismoney.cpp: In function 'Point f(ll, ll, bool)':
timeismoney.cpp:35:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
timeismoney.cpp: In function 'void dnc(Point, Point)':
timeismoney.cpp:56:6: warning: unused variable 'i' [-Wunused-variable]
  int i, j;
      ^
timeismoney.cpp:56:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
timeismoney.cpp: In function 'int main()':
timeismoney.cpp:71:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
timeismoney.cpp:73:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~
timeismoney.cpp:74:89: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=1; i<=M; i++) scanf("%d%d%lld%lld", &E[i].u, &E[i].v, &E[i].x, &E[i].y), E[i].u++, E[i].v++;
                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 6 ms 380 KB Output is correct
8 Correct 13 ms 504 KB Output is correct
9 Correct 5 ms 252 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 248 KB Output is correct
13 Correct 6 ms 256 KB Output is correct
14 Correct 9 ms 376 KB Output is correct
15 Correct 8 ms 256 KB Output is correct
16 Correct 66 ms 376 KB Output is correct
17 Correct 69 ms 376 KB Output is correct
18 Correct 66 ms 376 KB Output is correct
19 Correct 507 ms 504 KB Output is correct
20 Correct 523 ms 632 KB Output is correct