Created
September 11, 2014 21:32
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Highway to Hell \o/
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#include <bits/stdc++.h> | |
using namespace std; | |
#define MAX 100000 | |
class vert { | |
public: | |
int d, n; | |
bool operator < (const vert &e) const { | |
return d > e.d; | |
} | |
}; | |
class edge { | |
public: | |
int to, w; | |
}; | |
vector<vert> verts; | |
vector<edge> edges[MAX]; | |
vert ve; | |
edge ed; | |
int t, v, e, s, o; | |
int a, b, w; | |
priority_queue<vert> fila; | |
int main() { | |
scanf("%d", &t); | |
while (t--) { | |
verts.clear(); | |
while(!fila.empty()) fila.pop(); | |
scanf("%d %d %d %d", &v, &e, &s, &o); | |
ve.d = -1; | |
for (int i = 0; i < v; i++) { | |
ve.n = i; | |
verts.push_back(ve); | |
edges[i].clear(); | |
} | |
verts[s-1].d = 0; | |
fila.push(verts[s-1]); | |
for (int i = 0; i < e; i++) { | |
scanf("%d %d %d", &a, &b, &w); | |
ed.to = b-1; | |
ed.w = w; | |
edges[a-1].push_back(ed); | |
ed.to = a-1; | |
edges[b-1].push_back(ed); | |
} | |
while(!fila.empty()) { | |
ve = fila.top(); | |
fila.pop(); | |
if (ve.n == o-1) break; | |
for (int i = 0; i < edges[ve.n].size(); i++) { | |
if (verts[edges[ve.n][i].to].d == -1 || verts[edges[ve.n][i].to].d > ve.d + edges[ve.n][i].w) { | |
verts[edges[ve.n][i].to].d = ve.d + edges[ve.n][i].w; | |
fila.push(verts[edges[ve.n][i].to]); | |
} | |
} | |
} | |
if (verts[o-1].d == -1) printf("NONE\n"); | |
else printf("%d\n", verts[o-1].d); | |
} | |
} | |
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