제출 #135788

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
135788		MvC	Training (IOI07_training)	C++11	30 / 100	5 ms	808 KiB

training

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
//#include "job.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e3+50;
const ll mod=1e9+7;
using namespace std;
int n,m,h[nmax],x,y,z,rs,sm,i,j,f[nmax],nr[nmax];
vector<pair<int,int> >a[nmax],g[nmax];
void dfs(int x,int p)
{
	h[x]=h[p]+1;
	for(int i=0;i<a[x].size();i++)
	{
		int y=a[x][i].fr,z=a[x][i].sc;
		if(y==p || z)continue;
		dfs(y,x);
	}
}
void rec(int x,int p)
{
	for(int i=0;i<g[x].size();i++)
	{
		int y=g[x][i].fr,z=g[x][i].sc;
		if(y==p || z)continue;
		rec(y,x);
	}
	for(int i=0;i<g[x].size();i++)
	{
		int y=g[x][i].fr,z=g[x][i].sc;
		if(h[y]>h[x])continue;
		f[y]=max(f[y],f[x]+z);
	}
	//rs=max(rs,f[x]);
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=m;i++)
	{
		cin>>x>>y>>z;
		a[x].pb(mkp(y,z));
		a[y].pb(mkp(x,z));
		sm+=z;
		if(!z)
		{
			nr[x]++;
			nr[y]++;
		}
	}
	for(i=1;i<=n;i++)if(nr[i]==1)x=i;
	dfs(x,0);
	for(i=1;i<=n;i++)
	{
		for(j=0;j<a[i].size();j++)
		{
			y=a[i][j].fr,z=a[i][j].sc;
			if(!z || (h[i]&1)==(h[y]&1))g[i].pb(a[i][j]);
		}
	}
	rec(x,0);
	//for(i=1;i<=n;i++)cout<<f[i]<<" ";
	//cout<<endl;
	cout<<sm-f[x]<<endl;
    return 0;
}
/*
5 10

*/

컴파일 시 표준 에러 (stderr) 메시지

training.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
training.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
training.cpp: In function 'void dfs(int, int)':
training.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<a[x].size();i++)
              ~^~~~~~~~~~~~
training.cpp: In function 'void rec(int, int)':
training.cpp:36:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[x].size();i++)
              ~^~~~~~~~~~~~
training.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[x].size();i++)
              ~^~~~~~~~~~~~
training.cpp: In function 'int main()':
training.cpp:73:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<a[i].size();j++)
           ~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 7
• Subtask 5: 0 / 9
• Subtask 6: 0 / 9
• Subtask 7: 0 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9
• Subtask 11: 0 / 9