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Cod sursa(job #914184)
#include <cstdio>
#include <vector>
#include <queue>
#define NMAX 50001
#define INF (1 << 30)
using namespace std;
vector < pair < int, int > > G[NMAX];
queue < int > Q;
int n;
int d[NMAX];
int nr[NMAX];
void read()
{
int m;
int x;
int y;
int c;
freopen("bellmanford.in", "r", stdin);
scanf("%d %d\n", &n, &m);
while(m --)
{
scanf("%d %d %d\n", &x, &y, &c);
G[x].push_back(make_pair(y, c));
}
}
bool solve(int s)
{
Q.push(s);
for(int i = 1; i <= n; d[i ++] = INF);
d[s] = 0;
while(!Q.empty())
{
int x = Q.front();
Q.pop();
unsigned int m = G[x].size();
for(unsigned int i = 0; i < m; ++ i)
{
int y = G[x][i].first;
int c = G[x][i].second;
if(d[y] > d[x] + c)
{
d[y] = d[x] + c;
Q.push(y);
++ nr[x];
}
}
if(nr[x] > n)
return 0;
}
return 1;
}
void write()
{
for(int i = 2; i <= n; ++ i)
if(d[i] == INF)
printf("0 ");
else
printf("%d ", d[i]);
printf("\n");
}
int main()
{
read();
freopen("bellmanford.out", "w", stdout);
if(!solve(1))
printf("Ciclu negativ!\n");
else
write();
return 0;
}