結果
| 問題 |
No.160 最短経路のうち辞書順最小
|
| コンテスト | |
| ユーザー |
IL_msta
|
| 提出日時 | 2015-08-09 23:54:10 |
| 言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 2,986 bytes |
| コンパイル時間 | 978 ms |
| コンパイル使用メモリ | 99,676 KB |
| 実行使用メモリ | 814,020 KB |
| 最終ジャッジ日時 | 2024-07-18 06:24:45 |
| 合計ジャッジ時間 | 8,020 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 3 MLE * 1 -- * 22 |
ソースコード
#define _USE_MATH_DEFINES
#include <iostream>
#include <iomanip>
#include <sstream>
#include <algorithm>
#include <cmath>
#include <string>
//#include <array>
#include <list>
#include <queue>
#include <vector>
#include <complex>
#include <set>
#include <map>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
#define PII pair<int,int>
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////
const int Vmax = 200;
int main(void){
std::cin.tie(0);
std::ios::sync_with_stdio(false);
std::cout << std::fixed;//
//cout << setprecision(16);//
int N,M,start,goal;
cin>>N>>M>>start>>goal;
int vvc[Vmax][Vmax];
rep(i,200)rep(j,200)vvc[i][j] = -1;
int a,b,c;
rep(i,M){
cin>>a>>b>>c;
vvc[a][b] = c;
vvc[b][a] = c;
}
//(cost,pos)
priority_queue<vector<int>,vector<vector<int>>,greater<vector<int>>> q;
vector<int> itq;
bool use[Vmax];
PII dist[Vmax];//cost,prev
vector<int> bpath[Vmax];
rep(i,N){
use[i] = false;
dist[i] = PII( -1,-1);
}
vector<int> vec(3);
vec[0] = 0;
vec[1] = start;
vec[2] = start;
//cost,prev,now
q.push( vec );
vector<int> path1(Vmax),path2(Vmax);
while( !q.empty() ){
itq = q.top();q.pop();
if( use[ itq[2] ] == true ){
if( dist[ itq[2] ].first == itq[0]){
path1.clear();
path2.clear();
path1 = bpath[ itq[1] ];
path1.push_back( itq[2] );
path2 = bpath[ itq[2] ];
vector<int>::iterator it1,it2;
it1 = path1.begin();
it2 = path2.begin();
int pathCheck = -1;
{
int pathCount = 0;
while( it1 != path1.end() && it2 != path2.end() ){
if( *it1 > *it2 ){
pathCheck = 2;
break;
}else if( *it1 < *it2 ){
pathCheck = 1;
break;
}else{
++pathCount;
}
++it1;
++it2;
}
if( pathCheck == -1){
if( path1.size() < path2.size() ){
pathCheck = 1;
}else if( path1.size() < path2.size() ){
pathCheck = 2;
}
}
}
if( pathCheck == 1 ){
dist[ itq[2] ] = PII( itq[0],itq[1]);
bpath[ itq[2] ] = path1;
}else{
continue;
}
}
}else{
use[ itq[2] ] = true;
dist[ itq[2] ] = PII( itq[0],itq[1]);
bpath[ itq[2] ] = bpath[ itq[1] ];
bpath[ itq[2] ].push_back( itq[2] ) ;
}
for(int i=0; i<N ;++i){//頂点数
//if( use[i] == true || vvc[ itq[2] ][i] < 0 ) continue;
if( vvc[ itq[2] ][i] < 0 ) continue;
vec[0] = itq[0] + vvc[ itq[2] ][i];
vec[1] = itq[2];
vec[2] = i;
if( use[i] == true && dist[ vec[2] ].first < vec[0] ) continue;
q.push( vec );
}
}
int path[Vmax];
int pathCount = 0;
int pathPrev = goal;
while( pathPrev != start )
{
path[pathCount] = pathPrev;
++pathCount;;
pathPrev = dist[pathPrev].second;
}
path[pathCount] = start;
while(pathCount > 0){
cout << path[pathCount] << " ";
--pathCount;
}
cout << path[pathCount] << endl;
return 0;
}
IL_msta