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9 answers

Anonymous users2024-02-07

The commodities are:

Programmed out. After 10485124585 comparisons, it took 10 hours.

The ** of the four commodities will not be exceeded, so the control upper limit of the cycle does not have to be used; CPU integer operation speed is faster than decimal (floating-point) operation, so it should be converted to an integer; Don't directly judge whether a+b+c+d is equal to a*b*c*d, you should first judge whether a+b+c+d is equal to reduce the amount of calculation for each cycle;

for(a=1;a<=708;a++)

for(b=1;b<=708;b++)

for(c=1;c<=708;c++)

for(d=1;d<=708;d++)

if(a+b+c+d == 711)

if(a*b*c*d == 711000000)cout <

Anonymous users2024-02-06

In fact, it only takes dozens of loops to calculate the results.

First decompose the 711000000000 factor, and then try dozens of combinations.

Probably the total complexity is one millionth of the upstairs method.

Addendum: Of course, programming is preferred, but depending on the complexity, it is possible to calculate by hand in half a day.

Anonymous users2024-02-05

Upstairs wxisaac don't just talk nonsense, first decompose the 71100000000 factor, and then try dozens of combinations, is it manual or programming, is it feasible?

Anonymous users2024-02-04

Solution: Set up x tons of industrial wastewater and 572 x tons of domestic sewage silver water.

92% x (572 x) 57% 572 72% Lose Rubberside multiplied by 100, Frontal withered or gained.

92x＋572×57－57x＝572×7235x＝8580

x 245 Domestic sewage: 572 x 572 245 327

Anonymous users2024-02-03

A road has been repaired for 800m, and the remaining 500m is unrepaired, so what percentage of the road is unrepaired?

400kg of sesame seeds can be used to extract 180kg of oil, and the oil yield of sesame seeds is 180 400 100% = 45%.

150 tons of seawater salt tons, find the salinity of seawater.

Salinity rate = 40 students in class 61, 30 students in the last unit assessment. Find the excellent rate of the last time, excellent rate = 30 40 100% = 75% satisfaction.

Anonymous users2024-02-02

Let the original number be x, and move only 2 bits to x 100, x-x 100=(99 100)x= solution x=

Anonymous users2024-02-01

This is a typical type in arithmetic: the difference factor problem.

Know what the difference between the two is, know what the multiple of the two is, and find the two numbers.

Formula: Decimal = Difference (Multiple-1).

Large number = decimal number * multiple.

The difference in this question is, multiple=100

Decimal = large number (original number) = 0,068 * 100 =

Anonymous users2024-01-31

Solution: If the decimal point of a number is moved two places to the left, it is 100 times smaller than the original number.

Let the original number be x, then the digits will be reduced.

Therefore: x=

Anonymous users2024-01-30

If the decimal point of a number is moved two places to the left to become the original, the difference between the original number and the current number is the original number of the original number =