世界在身后，观我背影辽阔

/*PROBLEM C : DEAN AND SCHEDULE "SOLVED" */ /*TIME : ________________________________*/ #include "cstdio" #include "cstring" #include "cctype" #include "algorithm" #include "cmath" #include "vector" u

/* 相关公式 S(x) = M[j]*(x[j+1]-x)^3/(6*h[j])+M[j+1]*(x-x[j])^3/(6*h[j])+ (y[j]-M[j]*h[j]^2/6)*(x[j+1]-x)/h[j]+(y[j+1]-M[j+1]*h[j]^2/6)*(x-x[j])/h[j]; ps:h[j] = x[j+1]-x[j]; ps:u[j] = h[j-1]/(h[j-1]+h[