一個整數(shù)N。
對于40%的數(shù)據(jù),1<=N<=1000
對于70%的數(shù)據(jù),1<=N<=10000
對于100%的數(shù)據(jù),1<=N<=100000
4
3
2018年真題精選
2194,2276,2277,2279,2280,2281,2282,2283,2284,2285,2286,2287,
2288,2291,2292,2294,2296
2194,2276,2277,2279,2280,2281,2282,2283,2284,2285,2286,2287,
2288,2291,2292,2294,2296