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[129] | 1 | //Author Antonio-Gabriel Sturzu |
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| 2 | |
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| 3 | #include<stdio.h> |
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| 4 | #include<vector> |
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| 5 | #include<string.h> |
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| 6 | #include<time.h> |
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| 7 | #define pb push_back |
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| 8 | #define mp make_pair |
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| 9 | #define inf 50000001 |
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| 10 | |
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| 11 | using namespace std; |
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| 12 | |
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| 13 | int main() |
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| 14 | { |
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| 15 | int n,m,i,a,b,c,d[10005],min,nod=0,j; |
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| 16 | vector< pair<int,int> > v[10005]; |
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| 17 | char viz[10005]; |
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| 18 | clock_t start,stop; |
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| 19 | FILE *f=fopen("dijkstra2.in","r"); |
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| 20 | |
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| 21 | fscanf(f,"%i%i",&n,&m); |
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| 22 | for(i=0;i<m;i++) |
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| 23 | { |
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| 24 | fscanf(f,"%i%i%i",&a,&b,&c); |
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| 25 | v[a].pb(mp(b,c)); |
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| 26 | } |
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| 27 | fclose(f); |
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| 28 | |
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| 29 | memset(viz,0,sizeof(viz)); |
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| 30 | start=clock(); |
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| 31 | d[1]=0; |
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| 32 | for(i=2;i<=n;i++) |
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| 33 | d[i]=inf; |
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| 34 | |
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| 35 | for(;;) |
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| 36 | { |
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| 37 | min=inf; |
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| 38 | for(i=1;i<=n;i++) |
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| 39 | { |
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| 40 | if(viz[i]==0 && d[i]<min) |
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| 41 | { |
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| 42 | min=d[i]; |
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| 43 | nod=i; |
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| 44 | } |
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| 45 | } |
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| 46 | if(min==inf) |
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| 47 | break; |
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| 48 | viz[nod]=1; |
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| 49 | for(j=0;j<(int) v[nod].size();j++) |
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| 50 | { |
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| 51 | if(v[nod][j].second+d[nod]<d[v[nod][j].first]) |
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| 52 | d[v[nod][j].first]=v[nod][j].second+d[nod]; |
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| 53 | } |
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| 54 | } |
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| 55 | stop=clock(); |
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| 56 | printf("Au trecut %f secunde\n",(double) (stop-start)/CLOCKS_PER_SEC); |
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| 57 | |
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| 58 | f=fopen("dijkstra.out","w"); |
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| 59 | for(i=2;i<=n;i++) |
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| 60 | { |
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| 61 | if(d[i]==inf) |
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| 62 | d[i]=0; |
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| 63 | fprintf(f,"%i ",d[i]); |
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| 64 | } |
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| 65 | fprintf(f,"%s","\n"); |
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| 66 | fclose(f); |
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| 67 | return 0; |
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| 68 | } |
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