/* Ch
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000 0
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001 1
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010 0
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011 1
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100 0
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101 0
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110 1
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111 1
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out = a&b ^ (!a)&c =>
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out = a*(b-c) + c
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*/
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template Ch(n) {
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signal input a[n];
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signal input b[n];
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signal input c[n];
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signal output out[n];
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for (var k=0; k<n; k++) {
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out[k] <== a[k] * (b[k]-c[k]) + c[k];
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}
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}
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