C 解法, 执行用时: 5ms, 内存消耗: 376K, 提交时间: 2022-04-23 21:16:55

#include<stdio.h>
#include<math.h>
int main()
{
	int x1,x2,x3,x4,y1,y2,y3,y4,z1,z2,z3,z4;
	double v;
	scanf("%d%d%d",&x1,&y1,&z1);
	scanf("%d%d%d",&x2,&y2,&z2);
	scanf("%d%d%d",&x3,&y3,&z3);
	scanf("%d%d%d",&x4,&y4,&z4);
	v=1.0/6*((x1-x2)*((y3-y2)*(z4-z2)-(z3-z2)*(y4-y2))-(x3-x2)*((y1-y2)*(z4-z2)-(z1-z2)*(y4-y2))+(x4-x2)*((y1-y2)*(z3-z2)-(z1-z2)*(y3-y2)));
	printf("%lf",fabs(v));
}

pypy3 解法, 执行用时: 140ms, 内存消耗: 25756K, 提交时间: 2022-04-23 10:24:07

x1,y1,z1 = map(int,input().strip().split())
x2,y2,z2 = map(int,input().strip().split())
x3,y3,z3 = map(int,input().strip().split())
x4,y4,z4 = map(int,input().strip().split())

print(abs((x2-x1)*(y3-y1)*(z4-z1) + (x3-x1)*(y4-y1)*(z2-z1) + (x4-x1)*(y2-y1)*(z3-z1) - (x4-x1)*(y3-y1)*(z2-z1) - (x3-x1)*(y2-y1)*(z4-z1) - (x2-x1)*(y4-y1)*(z3-z1))/6)

Python3 解法, 执行用时: 49ms, 内存消耗: 4640K, 提交时间: 2022-04-24 19:21:34

x1,y1,z1 = map(int,input().strip().split())
x2,y2,z2 = map(int,input().strip().split())
x3,y3,z3 = map(int,input().strip().split())
x4,y4,z4 = map(int,input().strip().split())
ans = abs((x2-x1)*(y3-y1)*(z4-z1)+(x3-x1)*(y4-y1)*(z2-z1)+(x4-x1)*(y2-y1)*(z3-z1)-(x4-x1)*(y3-y1)*(z2-z1)-(x3-x1)*(y2-y1)*(z4-z1)-(x2-x1)*(y4-y1)*(z3-z1))/6
print(ans)

C++ 解法, 执行用时: 5ms, 内存消耗: 432K, 提交时间: 2022-04-25 09:28:55

#include<bits/stdc++.h>
using namespace std;
double a[12];
int main()
{
    for(int i=0;i<12;i++)
        scanf("%lf",&a[i]);
    for(int i=3;i<12;i++)
        a[i]-=a[i%3];
    double x=(a[4]*a[8]-a[5]*a[7])*a[9],y=(a[3]*a[7]-a[4]*a[6])*a[11],z=(a[5]*a[6]-a[3]*a[8])*a[10];
    printf("%.14lf\n",abs(x+y+z)/6.0);
    
}