4017 circuits

OutputPwnedwowsuchproblemmanystringsoeasymuchlinearalgebraabcdabchLink http://acm.hdu.edu.cn/showproblem.php?pid=4850Test instructions: A string with an output length of n and a substring of length 4 that cannot be duplicated in lowercase letters.Procedure: Strings with a maximum length of 4 have 26^4 altogether, if they are able to connect such as AAAA and Aaab can be connected as Aaaab. If all can be connected, the longest length is 26^4+3= 456979.Structure, first the same structure, aaaabbbb

powered, or the message "Impossible"If there is no-to-direct a sufficient amount of current to each component simultaneously.Sample Input6 10 + 1 1 1 2 1 1 3 2 2 4 5 +-1 4 3 2 3 5 5 4 6 2 5-1 6 5 3 4 6 + 1 8 1 2 4 1 3 5 2 4 6 3-1 3 4 3 0 0Sample Output9 ImpossibleSource2008 ACM-ICPC Pacific Northwest RegionRecommendchenrui | We have carefully selected several similar problems for you:3155 3154 3151 3156 3158Test instructions: There are two positive and negative n nodes and M components, each of

Codeforces 91C Ski Base addition edge Euler's number of circuits Question: Returns n vertices and m undirected edges. Start to merge without edges, add an edge each time, and then output the number of Euler loop. Ideas: We will count the number of ski bases including the base consisted of empty subset of edges (before printing just subtract one ). in the beginning the number of bases is equal to 1. if we connect vertexes in the same connected compon

the main backplane, resetting multiple neighboring modules in the system and destroying the module's connectors.This problem can be solved by the hot-swap controller (Figure 1), the hot-swap controller can control the inrush current reasonably, and ensure the safe power-on interval. After power-on, the hot-swappable controller also continuously monitors the supply current, avoiding short circuits and overcurrent during normal operation.Figure 1 Hot-s

Let's take a look at some interesting "lie detector" small circuits, which are the principle of detecting the skin resistance between fingers.Lie detector circuit 1The circuit detects the resistance between your fingers to produce oscillations. Dry fingers will detect a resistance of up to 100,000 ohms, which will make the circuit sound at low frequency oscillation. If the subject is nervous, he sweats, which lowers the skin's resistance and causes th

Crazy Circuits Question: A circuit board is provided, starting from the + pole to the negative pole. Now, the minimum current limit on the circuit board is required to obtain the minimum current starting from the positive pole when the current is balanced. Algorithm: A very bare minimum stream with a source sink. First, find the maximum stream. Then, by adding t --> S capacity INF, it becomes a problem of the minimal stream with no source sink, so t

Title: hdoj 3157 crazy Circuits Now we want to make a circuit board. There are n electronic components on the circuit board, and there is a unidirectional flow of current between each component. Then there is a plus, the current enters, and the current is imported, then judge whether the circuit board can work. If yes, find the minimum current. Analysis: the upper and lower bound network streams are used to find the smallest streams. The first is to

this point we need to reduce the 15v voltage to 12VNow it is possible to analyze a situation if the temperature switch is connected directly to the power device.The answer is no, for the following reasons.Temperature sensor switch through the current is limited, so the temperature switch can not be directly connected to the power device, the temperature switch can only provide signals.Now we're going to consider a device transistor.When the transistor's base-level current IB>1MA transistor is i

→ 1:1002 → t:100The problem is that there is a ring in the original. Loop flow, and we're not using it, causing the flow to increase.Workaround: Don't add t first → s edge right for infinite side, ask SS → The maximum flow of the TT, assuming that there is no flow full then add t → s edge right for infinite edge, and then the maximum flow to get the remorse edge s → T is the minimum flow of the original problem. Ps:1: The edges in the network stream are forward. Be sure to pay attention to

violates the cross-clock domain processing method.Riple The glitch filter circuit is mainly used to filter out the diow-signal falling edge glitch, which has no effect on the rising edge Burr. The rising edge burr does not cause data errors in this circuit.Riple When using this glitch filter circuit, you must consider the proportional relationship between the level length of the filtered signal and the synchronization clock period. In this example, if the 20 NS clock is used for filtering

level or low levelGpxup Register: A bit is 1 o'clock, the corresponding pin has no internal pull-up resistor, for 0 o'clock, the corresponding pin using the internal pull-up resistor 1.4.2 Gpio pin useThere are 3 types of s3c2440 pin operation: output high and low level, detection pin status, interruptTo light led for example, mini2440 led1-4 respectively corresponds to gpb5-8If we want to control these LEDs, we first need to set the gpb5-8 corresponding bit in the Gpbcon register as the output

data areas, and intersection lines are data-changing points of time.The longitudinal longest dashed line is the reference point for data and control signal acquisition, i.e., the falling edge sampling of the HstrobeIn the case of output readout data, both the shadow and non-shaded areas are read-out data time periods, but the shaded area represents the unstable period, and the non-shaded area represents the stable validity period of the data, which can be sampled to read valid data at the momen

better the performanceAC Resistor rd: the ratio of the voltage micro-change to the corresponding micro-current change3.3 Zener DiodeThe reverse voltage changes very little when the diode is working in the reverse breakdown area and the reverse current varies greatly. Four, semiconductor transistor 4.1 amplification of transistors Transmit Junction is positive, the transmitting knot multi-sub-diffusion to the base region, the set of electrical junction reverse bias generated r

         A logic circuit can have one input variable and several output variables. Each output variable is the logical function of the input, the state of the output variable at each time point is only related to the state of the input variable at

I. Computer history generation constitutes the first generation computer vacuum tube computer (ENIAC) second generation computer transistor computer third generation computer Integrated circuit fourth generation computer large-scale (LSI) and VLSI

Program-controlled switches are quite commonly used. So I studied the network monitoring system design of the power supply of program-controlled switches for LAN. I would like to share it with you here and hope it will be useful to you. The

1. Power: (1) Definition: the number of electric resources contained in an object is expressed by the symbol "Q. (2) unit: the colon (database), represented by the symbol "C. (3) inspection: Electric Appliance (structure, principle, and use ). 2.

/* HDU 3157poj 3801 question: a circuit board with N wiring bars (Number 1 ~ N) there are also two power supply terminals +-and then the terminals and the minimum current of M parts are given to find a total current that can make all parts work

1. Do you see the light on the optical transceiver or optical module and the twisted pair port led? A, such as the transceiver of the optical port (FX) LED is not lit, please determine if the fiber link is cross link? The fiber jumper is connected

In the circuit analysis, often hear the so-called phase lead lag what, has been trying to understand, the voltage is added to the device at both ends, for the power output and device input is necessarily the same phase, Ah, why will appear ahead and