#include using namespace std; #define REP(i,a,n) for(int i=(a); i<(int)(n); i++) #define rep(i,n) REP(i,0,n) #define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it) #define ALLOF(c) (c).begin(), (c).end() typedef long long ll; typedef unsigned long long ull; int main(){ ll P, Q, A; cin >> P >> Q >> A; if(P < Q){ ll ret = 1000000000; REP(x,1,1000000){ ll X = (100 + P) * x / 100.0; ll Y = (100 + Q) * x / 100.0; Y += A; if(X >= Y) ret--; } cout << ret << endl; return 0; } else if(P == Q){ if(A == 0) cout << 0 << endl; else cout << 1000000000 << endl; return 0; } // P > Q ll lb = 1, ub = 1000000001; while(ub-lb>1){ ll x = (lb+ub)/2; ll X = (100 + P) * x / 100.0; ll Y = (100 + Q) * x / 100.0; Y += A; if(X < Y) lb = x; else ub = x; } ll ret = lb; REP(i,1,1000000){ { ll x = lb - i + 1; if(x >= 1){ ll X = (100 + P) * x / 100.0; ll Y = (100 + Q) * x / 100.0; Y += A; if(X == Y) ret--; } } { ll x = lb + i; if(x <= 1000000000){ ll X = (100 + P) * x / 100.0; ll Y = (100 + Q) * x / 100.0; Y += A; if(X < Y) ret++; } } } cout << ret << endl; return 0; }