Masterchef Daniel recently baked a big pizza that can be represented as a grid of N rows and M columns, each cell can be either empty or contain a jalapeno, Daniel wants to cut out a sub-rectangle from the pizza which contains even number of jalapenos. Before cutting such a sub-rectangle, he is interested in knowing how many sub-rectangles are there which contains even number of jalapenos. First line of input consist of two integers P and Q. Each of the next P lines contains a string of length Q, j-th character of i-th string is 1 if the corresponding cell contains a jalapeno otherwise it's 0. Output a single integer, the number of sub rectangles which contains even number of jalapeno. Sample Input: 2 2 21 01 Output:

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Parallel processing

The process of running two or more processors together is known as parallel processing. In parallel processing, a single process is divided into multiple parts, and each individual part is executed at the same time. It is used to handle various parts of a task at the same time. The main advantage of parallel processing is the reduction of the processing time of the program, where the processor in a system is the CPU. Hence, parallel processing can be performed by using multiple CPUs, and having more than one CPU creates a multi-processor. Another name of parallel processors is block processors. Here, the size of a block is the number of inputs that can be processed simultaneously in a single clock cycle.