26 lines
306 B
C++
26 lines
306 B
C++
#include<iostream>
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using namespace std;
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int main()
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{
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long double s=1;
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for(int i=2;i<=100;i++)
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{
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if(i%2==1) s=s-i;
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else s=s+i;
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}
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cout<<int(s)<<endl;
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s=0;
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for(int i=1;i<=10;i++)
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{
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s=s+i*(11-i);
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}
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cout<<int(s)<<endl;
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s=0;
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for(int i=1;i<=100;i++)
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{
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s=s+1.0/i;
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}
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cout<<s;
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while(true);
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}
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