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							|  | #include "head.h"
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							|  | 
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							|  | int foo(int x){
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							|  | 	return 2*x;
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							|  | }
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							|  | 
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							|  | int foo1(int x){
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							|  | 	return x;
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							|  | }
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							|  | 
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							|  | int foo2(int x){
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							|  | 	return x*x;
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							|  | }
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							|  | 
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							|  | int main(){
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							|  | 	test();
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							|  | 	//int x = foo(1);
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							|  | 	int y = foo1(1);
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							|  | 	int z = foo2(1);
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							|  | 	return 0;
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							|  | }
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