摘要：
/* 不仅求最优解，还要过程,我的懒方法，执行两次。*/// include file#include <cstdio>#include <cstdlib>#include <cstring>#include <cmath>#include <cctype>#include <ctime>#include <iostream>#include <sstream>#include <fstream>#include <iomanip>#include <bitset> 阅读全文
摘要：
// include file#include <cstdio>#include <cstdlib>#include <cstring>#include <cmath>#include <cctype>#include <ctime>#include <iostream>#include <sstream>#include <fstream>#include <iomanip>#include <bitset>#include <algorithm># 阅读全文
摘要：
/* 不找规律，打表，搜索,O(n)*/// include file#include <cstdio>#include <cstdlib>#include <cstring>#include <cmath>#include <cctype>#include <ctime>#include <iostream>#include <sstream>#include <fstream>#include <iomanip>#include <bitset>#includ 阅读全文
摘要：
/* a[i] = (a[i-1]+a[i+1])/2-c[i]; (a[i]+c[i])*2=a[i-1]+a[i+1] a[i+1]= (a[i]+c[i])*2-a[i-1]; a[i] = (a[i-1]+c[i-1])*2-a[i-2] a[2] = (a[1]+c[1])*2-a[0] = 2*a[1]-a[0]+2*c[1] a[3] = (a[2]+c[2])*2-a[1] = ( (a[1]+c[1])*2-a[0]+c[2] )*2-a[1] = = 4*(a[1]+c[1])-2*a[0]+2*c[2]-a[1] = 3*a[1]-2*a[0]+2*c[2]+4*c[1] 阅读全文