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15 lines
184 B
C++
15 lines
184 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main(){
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int x;
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int y;
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cin >>x>>y;
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if(x>=-1 && x<=1 && y>=-1 && y<=1){
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cout <<"yes";
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}
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else{
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cout <<"no";
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}
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return 0;
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}
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