#include<stdio.h>#include<string.h>#include<stdlib.h>#include<algorithm>using namespace std;#define N 10010int a[N],b[N];int n;char s[16];int main(){ while(scanf("%d",&n)&&n) { int i,j,l,tag; memset(a,0,sizeof(a)); memset(b,0,sizeof(b)); for(i=0;i<n;i++) { scanf("%s",s); l=strlen(s); tag=1; for(j=1;j<l;j++) { if(s[j]==',') continue; if(s[j]=='.') { tag=0; continue; } if(tag) a[i]=a[i]*10+(s[j]-'0'); else b[i]=b[i]*10+(s[j]-'0'); } } int ans1=0; int ans2=0; for(i=0;i<n;i++) { ans1+=a[i]; ans2+=b[i]; } char p[16]; ans1+=ans2/100; ans2%=100; printf("$"); sprintf(p,"%08d",ans1); int flag=-1; for(i=0;i<8;i++) { if(p[i]!='0') { flag=i;break; } } if(flag==-1) printf("0"); else { for(i=flag;i<8;i++) { printf("%c",p[i]); if(i==1||i==4) printf(","); } } printf(".%02dn",ans2); }}
