Cod sursa(job #989976)
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <fstream>
using namespace std;
const string file = "dijkstra";
const string infile = file + ".in";
const string outfile = file + ".out";
vector<vector<pair<int, int> > > G;
vector<int> dist;
const int INF = 0x3f3f3f3f;
set<pair<int, int> > q;
void Dijkstra()
{
dist[1] = 0;
q.insert(make_pair(0, 1));
while(q.empty() == false)
{
int current = q.begin()->second;
q.erase(q.begin());
for(vector<pair<int, int> >::iterator itr = G[current].begin();
itr != G[current].end();
itr++)
{
if(dist[itr->first] > dist[current] + itr->second)
{
if(dist[itr->first] != INF)
{
q.erase(q.find(make_pair(dist[itr->first], itr->first)));
}
dist[itr->first] = dist[current] + itr->second;
q.insert(make_pair(dist[itr->first], itr->first));
}
}
}
}
int main()
{
fstream fin(infile.c_str(), ios::in);
int N, M;
fin >> N >> M;
G.resize(N + 1);
dist.resize(N + 1, INF);
for(int i = 0; i < M; i++)
{
int x, y, c;
fin >> x >> y >> c;
G[x].push_back(make_pair(y, c));
}
fin.close();
Dijkstra();
fstream fout(outfile.c_str(), ios::out);
for(int i = 2; i <= N; i++)
{
fout << ((dist[i] == INF) ? 0 : dist[i]) << " ";
}
fout << "\n";
fout.close();
}