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谁能告诉我为什么我的Dijkstra TLE了。。。十分感谢#include<iostream> #include<cmath> #include<algorithm> #define inf 9999999.9 double x[201],y[201],g[201][201],dis[201]; int u[201],cnt; int main() { int i,j,k,flag; double a,b,min,temp; scanf("%lf%lf%lf%lf",&x[1],&y[1],&x[2],&y[2]); cnt=3; while(scanf("%lf%lf",&a,&b)!=EOF) { if(a==-1&&b==-1) { continue; } if(a==-2&&b==-2) break; x[cnt]=a; y[cnt]=b; cnt++; } for(i=1;i<cnt;i++) for(j=1;j<cnt;j++) { if(i==j||g[i][j]!=0.0) continue; else if(y[i]==y[j]) g[i][j]=g[j][i]=sqrt((x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]))/40000.0; else g[i][j]=g[j][i]=sqrt((x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]))/10000.0; } u[1]=1; for(i=1;i<cnt;i++) dis[i]=g[1][i]; for(i=1;i<cnt;i++) { min=inf; for(j=1;j<cnt;j++) { if(!u[j]&&dis[j]<min) { min=dis[j]; k=j; } } u[k]=1; for(j=1;j<cnt;j++) { if(dis[j]>dis[k]+g[k][j]) dis[j]=dis[k]+g[k][j]; } } printf("%d\n",(int)(60.0*dis[2])); return 0; } Followed by:
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