a,b,c,d,e;main(){for(;scanf("%d",&a),a+1;printf("%d miles\n",b))for(b=c=0;a--;b+=d*(e-c),c=e)scanf("%d%d",&d,&e);}
Saturday 11 April 2009
POJ 2017
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a,b,c,d,e;main(){for(;scanf("%d",&a),a+1;printf("%d miles\n",b))for(b=c=0;a--;b+=d*(e-c),c=e)scanf("%d%d",&d,&e);}
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