/** * @brief Codeforces Round #282 (Div. 2) b * @file b.cpp * @author mianma * @created 2014/12/15 9:55 * @edited 2014/12/15 9:55 * @type math * @note */#include #include #include #include using namespace std;#define max(a, b) ((a) > (b) ? (a) : (b))#define min(a, b) ((a) > (b) ? (b) : (a)) #define abs(a) ((a) > 0 ? (a) : (0 - (a)))#define CLR(vec) memset(vec, 0, sizeof(vec))#ifdef DEBUGifstream in;ofstream out;#define CIN in#define COUT out#else#define CIN cin#define COUT cout#endifint a, b, c, cnt;double cf;int main(void){ ios_base::sync_with_stdio(0);#ifdef DEBUG CIN.open("./in", ios::in); COUT.open("./out", ios::out);#endif CIN >> a >> b; if(a == b){ COUT << "infinity\n"; return 0; } if(a < b){ COUT << "0\n"; return 0; } a -= b; cf = sqrt((double)a); c = (int)floor(cf + 0.5); cnt = 0; for(int i = 1; i <= c; i++){ if( 0 == a%i){ if(a/i > b) ++cnt; if(i > b) ++cnt; } }#ifdef DEBUG COUT << cf << " <-> " << c << "\n";#endif if(cf == c){ if(0 == a%c && c > b) --cnt; } COUT << cnt << "\n"; return 0;}