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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#384801 | #8340. 3 Sum | triple_dogs# | WA | 274ms | 45704kb | C++14 | 1.8kb | 2024-04-10 12:33:05 | 2024-04-10 12:33:07 |
Judging History
answer
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
typedef array<int,3> ar;
int n,k,cnt0;
mt19937_64 gen(time(0));
ar mod,A[505];
map<ar,int> cnt;
vector<ar> ss;
vector<int> a[505];
bool isprime(int x){
for (int j=2;j*j<=x;j++) if (x%j==0) return 0;
return 1;
}
ar add(ar u,ar v){
ar ret;
for (int i=0;i<3;i++) ret[i]=(u[i]+v[i])%mod[i];
return ret;
}
ar sub(ar u,ar v){
ar ret;
for (int i=0;i<3;i++) ret[i]=(u[i]-v[i]+mod[i])%mod[i];
return ret;
}
vector<int> read(){
string s; cin >> s;
int m=s.size();
vector<int> ret;
for (int i=m-1;i>=0;i--) ret.pb(s[i]-'0');
return ret;
}
vector<int> F(vector<int> &a){
vector<int> ret(k+10,0);
for (int i=0;i<a.size();i++) ret[i%k]+=a[i];
for (int i=0;i<ret.size()-1;i++){
ret[i+1]+=ret[i]/10;
ret[i]%=10;
}
while (ret.size()&&!ret.back()) ret.pop_back();
return ret;
}
int main(){
for (int i=0;i<3;i++){
mod[i]=500000000+gen()%500000000;
while (!isprime(mod[i])) mod[i]++;
}
cin >> n >> k;
ar s[3];
for (int i=0;i<3;i++){
for (int p=0;p<3;p++) s[i][p]=0;
}
for (int i=0;i<3;i++)
for (int j=0;j<k;j++)
for (int p=0;p<3;p++)
s[i][p]=(1ll*s[i][p]*10+i*9)%mod[p];
for (int i=0;i<n;i++){
a[i]=read();
while (a[i].size()>k) a[i]=F(a[i]);
ar h; for (int j=0;j<3;j++) h[j]=0;
for (int j=(int)a[i].size()-1;j>=0;j--){
for (int p=0;p<3;p++) h[p]=(1ll*h[p]*10+a[i][j])%mod[p];
}
A[i]=h;
}
int ans=0;
for (int i=0;i<n;i++){
for (int j=0;j<3;j++) cnt[sub(s[j],A[i])]++;
for (int j=i;j<n;j++) ans+=cnt[add(A[i],A[j])];
}
cout << ans << endl;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3692kb
input:
4 1 0 1 10 17
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 51ms
memory: 13556kb
input:
500 859 7118711592236878297922359501613604144948355616986970837340677671376753603836852811886591300370143151943368529129749813118476151865844255212534355441611481420938483178075143062691345257288242460282715389758789648541099090735875617822348551942134616963557723055980260082230902505269975518146286...
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 274ms
memory: 45704kb
input:
500 17336 11871159223687829792235950161360414494835561698697083734067767137675360383685281188659130037014315194336852912974981311847615186584425521253435544161148142093848317807514306269134525728824246028271538975878964854109909073587561782234855194213461696355772305598026008223090250526997551814628...
output:
0
result:
ok 1 number(s): "0"
Test #4:
score: -100
Wrong Answer
time: 155ms
memory: 3804kb
input:
500 1 751324443898124078584847834484321089092662321556147445230263526014359393841194947303407593948729802551881289193716611867931891257925091769456350249725997883453296895094445731130479434019358742162771547784250401546380268386074363779242500860317042151185119666027858022664683818314351285215150806...
output:
2277515
result:
wrong answer 1st numbers differ - expected: '2327631', found: '2277515'