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#include "head.h"
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int foo(int x){
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//return 2*x;
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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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int foo2(int x){
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return x*x;
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}
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int main(){
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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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