28 lines
592 B
C++
28 lines
592 B
C++
#include <cstdint>
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#include <iostream>
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#include <limits>
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#include <sys/types.h>
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using ull = uint64_t;
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constexpr ull ullmax=std::numeric_limits<ull>::max();
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ull n;
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int main(){
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// std::cin>>*(ll *)(void*)&n;
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std::cin>>n;
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ull ans=0;
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for(ull i=1;i<=n;i++){
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static ull x,y;
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std::cin>>x>>y;
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static std::hash<ull> hash;
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static ull *arr =[]()->ull*{
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ull *a = new ull(ullmax+1);
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for(ull i=0;i<ullmax;i++){
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a[i]=0;
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}
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return a;
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}();
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ans=ans+i*arr[hash(x)]%ullmax;
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}
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} |