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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#231387 | #858. GCD vs. XOR | lnyx | WA | 0ms | 3384kb | C++14 | 1.4kb | 2023-10-29 10:04:47 | 2023-10-29 10:04:49 |
Judging History
answer
#include<cstdio>
#include<iostream>
#include<algorithm>
namespace IO{
template<typename T> inline void rd(T &x){
x=0;bool f=0;char c=0;
while(c<'0'||c>'9') f|=c=='-',c=getchar();
while('0'<=c&&c<='9') x=x*10+(c^48),c=getchar();
x=f?-x:x;
}
template<typename T,typename ...Args> inline void rd(T &x,Args &...args){rd(x),rd(args...);}
template<typename T> inline void wt(char c,T x){
int stk[114],top=0;
if(x<0) x=-x,putchar('-');
do stk[++top]=x%10,x/=10; while(x);
while(top) putchar(stk[top--]+'0');
putchar(c);
}
template<typename T,typename ...Args> inline void wt(char c,T x,Args ...args){wt(c,x),wt(c,args...);}
template<typename T,typename ...Args> inline void wt(char s,char c,T x,Args ...args){wt(c,x),wt(c,args...),putchar(s);}
};
using namespace IO;
using namespace std;
typedef long long LL;
const int N=2e6+7,M=1e6+7;
int n,mx;
int sum[M];
inline void solve(){
rd(n);
for(int i=1;i<=n;i++){
int x; rd(x);
sum[x]++,mx=max(mx,x);
}
LL ans=0;
for(int d=1;d<=n;d++){
for(int i=d;i<=mx;i+=d){
if((i^d)!=i+d) continue;
// if(sum[i]&&sum[i+d]) cerr<<i<<" "<<d<<endl;
ans+=1ll*sum[i]*sum[i+d];
}
}
wt('\n',ans);
for(int i=1;i<=mx;i++) sum[i]=0;
}
int main(){
#ifndef ONLINE_JUDGE
freopen("in.in","r",stdin);
freopen("out.out","w",stdout);
#endif
int T; rd(T);
while(T--) solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3316kb
input:
1 4 2 3 4 3
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: -100
Wrong Answer
time: 0ms
memory: 3384kb
input:
20 43 128 66 452 384 400 441 232 203 228 33 284 156 128 190 197 292 388 31 179 343 147 206 450 284 180 73 273 130 168 250 405 203 235 340 309 28 267 395 152 191 295 463 344 54 48 7 12 37 49 24 5 18 15 37 26 57 53 59 22 10 2 16 36 52 64 1 56 42 38 46 53 7 2 8 60 38 54 11 19 50 20 61 6 50 27 5 26 3 4 ...
output:
9 54 13 7 7 34 47 11 1 102 5 5 37 1 3 7 7 348 14 0
result:
wrong answer 5th numbers differ - expected: '8', found: '7'