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View Compilation Error

0_0_24536627_15981.cpp: In function 'int cow(int)':
0_0_24536627_15981.cpp:10:13: error: 'dp' was not declared in this scope
    if(n>=5&&dp[n-3]&&dp[n-1]) return a[n];
             ^
0_0_24536627_15981.cpp:11:21: error: 'f' was not declared in this scope
    return a[n]=f(n-1)+(n-3);
                     ^


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