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Last active December 22, 2015 13:19
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public boolean isUnique(string str) {
for(int i=0; i<str.size(); i++){
for(int j=0; j<str.size(); j++) {
if(i==j) continue;
else if(str.charAt(j) == str.charAt(i)) return false;
}
}
return true;
}
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