Submission #112526

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
112526	2019-05-20 12:09:22	nxteru	Race (IOI11_race)	C++14	100 / 100	588 ms	85672 KiB

race

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
#define F first
#define S second
#define PB push_back
#define INF 1000000000
int n,k,vs[200005],w[200005],la[200005],ans=INF;
vector<P>g[200005];
map<int,int>m[200005];
void merge(int x,int y){
  if(m[vs[x]].size()<m[vs[y]].size())swap(x,y);
  int vx=vs[x],vy=vs[y];
  for(map<int,int>::iterator i=m[vy].begin();i!=m[vy].end();i++){
    if(m[vx].find(k-w[vx]-w[vy]-i->F)!=m[vx].end())ans=min(ans,m[vx][k-w[vx]-w[vy]-i->F]+i->S+la[vx]+la[vy]);
  }
  for(map<int,int>::iterator i=m[vy].begin();i!=m[vy].end();i++){
    int c=i->F-w[vx]+w[vy];
    if(m[vx].find(c)!=m[vx].end())m[vx][c]=min(m[vx][c],i->S-la[vx]+la[vy]);
    else m[vx][c]=i->S-la[vx]+la[vy];
  }
  vs[y]=vx;
}
void dfs(int v,int p){
  for(int i=0;i<g[v].size();i++){
    int u=g[v][i].F,l=g[v][i].S;
    if(u==p)continue;
    dfs(u,v);
    w[vs[u]]+=l;
    la[vs[u]]++;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

race.cpp: In function 'void dfs(int, int)':
race.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[v].size();i++){
              ~^~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 22 / 22
• Subtask 4: 57 / 57