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Detect Circular Pattern Match

Code

#include <stdio.h>
#include <stdint.h>

uint8_t is_circular_match(uint16_t reg, uint16_t target) {
    //First Check by Left Rotation
    for(int i = 0; i < 16; i++){
        //Check the MSB Bit of the Target
        uint16_t MSB = target & 0x8000;
        target <<= 1;
        target |= MSB>>15;
        if(target & reg) return 1;
    }
    // Check by Right Rotation
    for(int i = 0; i < 16; i++){
        //Check the LSB Bit of the Target
        uint16_t LSB = target & 0x1;
        target >>= 1;
        target |= LSB << 15;
        if(target & reg) return 1;
    }

    return 0;
}

int main() {
    uint16_t reg, target;
    scanf("%hu %hu", &reg, &target);
    printf("%hhu", is_circular_match(reg, target));
    return 0;
}

Solving Approach

 

 

 

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Input

45056 11

Expected Output

1