제출 #204159

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
204159		cheetose	Designated Cities (JOI19_designated_cities)	C++11	0 / 100	320 ms	23544 KiB

designated_cities

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<ld> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[] = { -1,-2,1,-2,2,-1,2,1 }, ddy[] = { -2,-1,-2,1,-1,2,1,2 };

struct A{
	int y;
	ll c,d;
};
vector<A> v[200001];
ll sum;
ll q1;
ll dfs1(int N,int p=-1)
{
	ll res=0;
	for(auto &P:v[N])
	{
		if(P.y==p)continue;
		res+=P.d+dfs1(P.y,N);
	}
	return res;
}
void dfs2(int N,ll now,int p=-1)
{
	q1=max(q1,now);
	for(auto &P:v[N])
	{
		if(P.y==p)continue;
		dfs2(P.y,now+P.c-P.d,N);
	}
}
int main() {
	int n,R;
	scanf("%d",&n);
	if(n==2)
	{
		int a,b,c,d,q;
		scanf("%d%d%d%d%d",&a,&b,&c,&d,&q);
		while(q--)
		{
			int x;
			scanf("%d",&x);
			if(x==1)printf("%d\n",min(c,d));
			else puts("0");
		}
		return 0;
	}
	fup(i,1,n-1,1)
	{
		int x,y;
		ll c,d;
		scanf("%d%d%lld%lld",&x,&y,&c,&d);
		sum+=c+d;
		v[x].pb({y,c,d});
		v[y].pb({x,d,c});
	}
	fup(i,1,n,1)if(v[i].size()>1)R=i;
	ll now=dfs1(R);
	dfs2(R,now);
	int q;
	scanf("%d",&q);
	while(q--)
	{
		int x;
		scanf("%d",&x);
		if(x==1)printf("%lld\n",q1);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

designated_cities.cpp: In function 'int main()':
designated_cities.cpp:72:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
designated_cities.cpp:76:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d%d",&a,&b,&c,&d,&q);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:80:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&x);
    ~~~~~^~~~~~~~~
designated_cities.cpp:90:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%lld%lld",&x,&y,&c,&d);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:99:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&q);
  ~~~~~^~~~~~~~~
designated_cities.cpp:103:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
   ~~~~~^~~~~~~~~
designated_cities.cpp:96:15: warning: 'R' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ll now=dfs1(R);
               ^

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