| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 41082 |
2018-02-12T14:50:27 Z |
comtalyst |
Race (IOI11_race) |
C++14 |
|
17 ms |
16132 KB |
/*
* Task: ioi11_race
* Lang: C/C++11
* Site: oj.uz
* Last Update: 12/2/2018
*/
#include <bits/stdc++.h>
//#pragma GCC optimize ("O3")
using namespace std;
/* Note
----------------------------
Learned :
Bugs found & solved :
Optimizations :
----------------------------
*/
#define x first
#define y second
#define umap unordered_map
#define pqueue priority_queue
#define mset multiset
#define mp make_pair
#define mt make_tuple
#define long long long
#define MOD 1000000007
#define MAX (int)(1e9+5)
#define MIN (int)(-1e9-5)
#define FILEIN_ freopen("__in.txt","r",stdin)
#define FILEOUT_ freopen("__out.txt","w",stdout)
#define FILEIN(text) freopen(text,"r",stdin)
#define FILEOUT(text) freopen(text,"w",stdout)
//int tmp[200005][2],tmp2[200005];
vector<pair<int,int>> adl[200005];
umap<int,int> s[200005];
int ls[200005],sid[200005],lv[200005],sc,n,m,mn=MAX;
void solve(int x,int f){
int i,y,id,v,need,w;
pair<int,int> mx={0,0};
lv[x] = lv[f]+1;
for(i = 0; i < adl[x].size(); i++){
y = adl[x][i].x;
if(y == f) continue;
solve(y,x);
id = sid[y];
mx = max(mx,{s[id].size(),y});
}
// printf(">>>>>>>>> %d from %d\n",x,f);
if(mx.x){
sid[x] = sid[mx.y];
}
else{
sid[x] = ++sc;
mx.y = 0;
}
for(i = 0; i < adl[x].size(); i++){
y = adl[x][i].x;
if(y == f || y == mx.y) continue;
id = sid[y];
while(!s[id].empty()){
v = (*s[id].begin()).x + ls[id];
need = m-v-ls[sid[x]];
// printf(":: %d\n",v);
if(s[sid[x]][need]){
// printf("<<<<< %d\n",s[sid[x]][need]+(*s[id].begin()).y-lv[x]*2);
mn = min(mn,s[sid[x]][need]+(*s[id].begin()).y-lv[x]*2);
}
else{
s[sid[x]].erase(need);
}
if(s[sid[x]][v-ls[sid[x]]]){
s[sid[x]][v-ls[sid[x]]] = min(s[sid[x]][v-ls[sid[x]]],(*s[id].begin()).y);
}
else{
s[sid[x]][v-ls[sid[x]]] = (*s[id].begin()).y;
}
s[id].erase(s[id].begin());
}
}
for(i = 0; i < adl[x].size(); i++){
y = adl[x][i].x;
w = adl[x][i].y;
if(y == f){
break;
}
}
need = m-w-ls[sid[x]];
if(s[sid[x]][need]){
mn = min(mn,s[sid[x]][need]-lv[f]);
}
else{
s[sid[x]].erase(need);
}
ls[sid[x]] += w;
s[sid[x]][w - ls[sid[x]]] = lv[x];
}
int best_path(int _n,int _m,int _edl[][2],int _edw[]){ // f*ck you 0-based idx
int i,j;
n = _n;
m = _m;
for(i = 0; i < n-1; i++){
adl[_edl[i][0]+1].emplace_back(_edl[i][1]+1,_edw[i]);
adl[_edl[i][1]+1].emplace_back(_edl[i][0]+1,_edw[i]);
}
solve(1,0);
return mn;
}
/*main(){
int t,i,j,k,_n,_m;
scanf("%d %d",&_n,&_m);
for(i = 0; i < _n-1; i++){
scanf("%d %d",&tmp[i][0],&tmp[i][1]);
}
for(i = 0; i < _n-1; i++){
scanf("%d",&tmp2[i]);
}
printf(">> %d\n",best_path(_n,_m,tmp,tmp2));
return 0;
}*/
Compilation message
race.cpp: In function 'void solve(int, int)':
race.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i = 0; i < adl[x].size(); i++){
~~^~~~~~~~~~~~~~~
race.cpp:60:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i = 0; i < adl[x].size(); i++){
~~^~~~~~~~~~~~~~~
race.cpp:84:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(i = 0; i < adl[x].size(); i++){
~~^~~~~~~~~~~~~~~
race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:103:8: warning: unused variable 'j' [-Wunused-variable]
int i,j;
^
race.cpp: In function 'void solve(int, int)':
race.cpp:91:10: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
need = m-w-ls[sid[x]];
~^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
15992 KB |
Output is correct |
| 2 |
Correct |
17 ms |
16132 KB |
Output is correct |
| 3 |
Incorrect |
15 ms |
16132 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
15992 KB |
Output is correct |
| 2 |
Correct |
17 ms |
16132 KB |
Output is correct |
| 3 |
Incorrect |
15 ms |
16132 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
15992 KB |
Output is correct |
| 2 |
Correct |
17 ms |
16132 KB |
Output is correct |
| 3 |
Incorrect |
15 ms |
16132 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
15992 KB |
Output is correct |
| 2 |
Correct |
17 ms |
16132 KB |
Output is correct |
| 3 |
Incorrect |
15 ms |
16132 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
