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激动,激动,一次AC,做个无私的人,铁代码#include <stdio.h>
int a,b,c,d,e,f,g,h,i,j,k,l;
int aa[10000],ab[10000],ac[10000];
int main () {
while(1){
scanf("%d",&a);
if(a==-1)break;
for(i=0;i<a;i++){
scanf("%d%d",&aa[i],&ab[i]);
}
for(i=a-1;i>0;i--){
ab[i]=ab[i]-ab[i-1];
}
for(i=0;i<a;i++){
b+=aa[i]*ab[i];
}
ac[c]=b;
c++;
b=0;
}
for(i=0;i<c;i++){
printf("%d miles\n",ac[i]);
}
}
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