QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#525508 | #8340. 3 Sum | liqingyang# | WA | 367ms | 12876kb | C++17 | 2.1kb | 2024-08-20 17:19:42 | 2024-08-20 17:19:43 |
Judging History
answer
#include<iostream>
#include<unordered_map>
#include<cstring>
#include<algorithm>
using namespace std;
const long long B=1e18;
const long long base=1e18+3;
int n,k;
char s[20010];
unsigned long long a[510][1120],b[1120],h[510];
unordered_map<unsigned long long,int> f;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cin>>n>>k;
for(int i=1;i<=n;i++)
{
cin>>s+1;
int len=strlen(s+1);
reverse(s+1,s+len+1);
for(int i=1;i<=len;i++)
{
s[i]-='0';
}
while(len>k)
{
int c=0;
for(int i=1;i<=k;i++)
{
s[i]+=c;
for(int j=i+k;j<=len;j+=k)
{
s[i]+=s[j];
}
c=s[i]/10,s[i]-=c*10;
}
len=k;
while(c)
{
s[++len]=c%10;
c/=10;
}
}
if(len==k)
{
bool flag=1;
for(int i=1;i<=len;i++)
{
if(s[i]<9)
{
flag=0;
break;
}
}
if(flag)
{
continue;
}
}
for(int j=1,num=0;j<=len;j+=18)
{
unsigned long long &x=a[i][++num];
for(int l=min(len,j+17);l>=j;x=x*10+s[l--]);
}
}
int K=(k-1)/18+1;
for(int i=1;i<=n;i++)
{
for(int j=1,c=0;j<=K;j++)
{
h[i]=h[i]*base+a[i][j];
}
unsigned long long p=9;
for(int j=1;j<=18;j++,p*=10)
{
if(j>k-(K-1)*18)
{
h[i]+=p;
}
}
}
unsigned long long p=9,h0=0,H0=0;
for(int j=1;j<=18;j++,p*=10)
{
if(j>k-(K-1)*18)
{
H0+=p;
}
}
for(int j=p=1;j<=k-K*18;j++,p*=10);
for(int j=1;j<=K;j++,h0=h0*base+B-1);
int ans=0;
for(int i=1;i<=n;i++)
{
for(int j=n;j>=i;j--)
{
f[h[j]]++;
bool c=0;
for(int k=1;k<=K;k++)
{
b[k]=a[i][k]+a[j][k]+c;
c=(b[k]>=B),b[k]-=c*B;
}
if(c||b[K]>=p)
{
if(b[K]>=p)
{
b[K]-=p;
}
for(int k=1;k<=K;k++)
{
if(b[k]<B-1)
{
b[k]++;
break;
}
b[k]=0;
}
}
bool flag=0;
unsigned long long h=0;
for(int k=1;k<=K;k++)
{
flag|=b[k];
h=h*base+B-1-b[k];
}
ans+=f[flag?h:H0];
}
for(int j=i;j<=n;j++)
{
f[h[j]]=0;
}
}
cout<<ans<<endl;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3608kb
input:
4 1 0 1 10 17
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 32ms
memory: 10620kb
input:
500 859 7118711592236878297922359501613604144948355616986970837340677671376753603836852811886591300370143151943368529129749813118476151865844255212534355441611481420938483178075143062691345257288242460282715389758789648541099090735875617822348551942134616963557723055980260082230902505269975518146286...
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 367ms
memory: 12876kb
input:
500 17336 11871159223687829792235950161360414494835561698697083734067767137675360383685281188659130037014315194336852912974981311847615186584425521253435544161148142093848317807514306269134525728824246028271538975878964854109909073587561782234855194213461696355772305598026008223090250526997551814628...
output:
0
result:
ok 1 number(s): "0"
Test #4:
score: -100
Wrong Answer
time: 16ms
memory: 5572kb
input:
500 1 751324443898124078584847834484321089092662321556147445230263526014359393841194947303407593948729802551881289193716611867931891257925091769456350249725997883453296895094445731130479434019358742162771547784250401546380268386074363779242500860317042151185119666027858022664683818314351285215150806...
output:
1155998
result:
wrong answer 1st numbers differ - expected: '2327631', found: '1155998'