【微积分】CodeForces 185B Mushroom Scientists

题目链接
f=a*ln(x)+b*ln(y)+c*ln(z)+λ*(S-x-y-z)
fx’=a/x+λ;
fy’=b/y+λ;
fz’=c/z+λ;
fλ’=S-x-y-z;

#include <cstdio>#include <cstring>#include <cstdlib>#include <string>#include <iostream>#include <algorithm>#include <sstream>#include <cmath>using namespace std;#include <queue>#include <stack>#include <vector>#include <deque>#include <set>#include <map>#define cler(arr, val)    memset(arr, val, sizeof(arr))typedef long long  LL;const int MAXN = 191;const int MAXM = 11111;const int INF = 0x3f3f3f3f;const LL mod =1000000007;#define lson l,m,rt<<1#define rson m+1,r,rt<<1|1int s,a,b,c;int main(){    cin>>s>>a>>b>>c;    int sum=a+b+c;    if(sum==0)        printf("%d 0 0\n",s);    else        printf("%.10lf %.10lf %.10lf\n",a*1.0/sum*s,b*1.0/sum*s,c*1.0/sum*s);    return 0;}