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			13 lines
		
	
	
		
			211 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			13 lines
		
	
	
		
			211 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
| pragma experimental SMTChecker;
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| contract C {
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| 	function mul(uint256 a, uint256 b) internal pure returns (uint256) {
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| 		uint256 c;
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| 		if (a != 0) {
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| 			c = a * b;
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| 			require(c / a == b);
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| 		}
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| 		return c;
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| 	}
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| }
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| // ----
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