UVa_Fractions Again?!
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题址:10976 Fractions Again?!
题意:
凑分数;
思路:
算出数学关系式,再暴力;
从给的例子中就可以看出y是递增的,x是递减的;
代码:
#include <iostream>#include <cstdio>#include <cstring>using namespace std;int x[10000];int y[10000];int main(){// freopen("in.txt", "r", stdin);// freopen("out.txt", "w", stdout); int k, kount; while(~scanf("%d", &k)) { kount = 0; memset(x, 0, sizeof x); memset(y, 0, sizeof y); // i = y; for(int i = k+1; i <= 2*k; i++) { if((k*i)%(i-k) == 0 && ((k*i)/(i-k) >= i)) { x[kount] = (k*i)/(i-k); y[kount] = i; kount++; } } printf("%d\n", kount); for(int i = 0; i < kount; i++) { printf("1/%d = 1/%d + 1/%d\n", k, x[i], y[i]); } } return 0;}
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