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DescriptionFarmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are an in... 阅读全文
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DescriptionFarmer John has received a noise complaint from his neighbor, Farmer Bob, stating that his cows are making too much noise. FJ's N cows (1 #... 阅读全文
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DescriptionThe cows have purchased a yogurt factory that makes world-famous Yucky Yogurt. Over the next N (1 inline int read(){ int x=0,f=1;char ch... 阅读全文
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DescriptionA crime has been comitted: a load of grain has been taken from the barn by one of FJ's cows. FJ is trying to determine which of his C (1 #i... 阅读全文
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DescriptionLongge的数学成绩非常好，并且他非常乐于挑战高难度的数学问题。现在问题来了：给定一个整数N，你需要求出∑gcd(i, N)(1#includeusing namespace std;#define LL long longLL n,m,ans;inline LL phi(L... 阅读全文
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Description清早6：00，Farmer John就离开了他的屋子，开始了他的例行工作：为贝茜挤奶。前一天晚上，整个农场刚经受过一场瓢泼大雨的洗礼，于是不难想见，FJ 现在面对的是一大片泥泞的土地。FJ的屋子在平面坐标(0, 0)的位置，贝茜所在的牛棚则位于坐标(X,Y) (-500 #in... 阅读全文