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想不到这样也能AC,郁闷#include <stdio.h>
#include <math.h>
main(){
double d = 0;
int x,X,y,Y,t;
scanf("%*d%*d");
while (4 == scanf("%d%d%d%d",&x,&y,&X,&Y)) {
d += hypot(x-X,y-Y);
}
t = d/1000*2/20*60+.5;
printf("%d:%0.2d\n",t/60,t%60);
}
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