#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define REP(i,n) for(long (i)=0;(i)<(n);(i)++) #define FOR(i,a,b) for(long (i)=(a);(i)<(b);(i)++) #define RREP(i,a) for(long (i)=(a)-1;(i)>=0;(i)--) #define FORR(i,a,b) for(long (i)=(a)-1;(i)>=(b);(i)--) #define MOD 1000000007 #define PI acos(-1.0) #define DEBUG(C) cout< #define PLL pair #define ALL(a) (a).begin(),(a).end() #define SORT(a) sort((a).begin(),(a).end()) typedef long long LL; typedef unsigned long long ULL; using namespace std; int main(void){ const int n=12; long N; cin>>N; vector T(N); vector S(N); long ans1=0,ans2=0; REP(i,N){ cin>>T[i]>>S[i]; T[i]=min((long)((n*T[i])/1000),(long)S[i].size()); ans1+=T[i]; ans2+=max((long)(S[i].size()-T[i]),(long)0); } cout<