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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 |
---|---|---|---|---|---|---|---|---|---|
#882880 | #8340. 3 Sum | ucup-team5077# | TL | 339ms | 34944kb | C++14 | 1.7kb | 2025-02-05 12:21:52 | 2025-02-05 12:21:53 |
Judging History
answer
#pragma GCC optimize(2)
#include <bits/stdc++.h>
using namespace std;
const int N=550,M=2e4+5,mod1=998244353,mod2=1e9+7,mod3=1e9+9;
int n,k;
char S[M];
int sum[M],has1[N],has2[N],has3[N];
int HAS1,HAS2,HAS3;
int cal(int *sum,int mod){
int tot=0;
for(int i=k-1;i>=0;i--){
tot=(1ll*tot*10%mod+sum[i])%mod;
}
return tot;
}
map < tuple<int,int,int>, int> mp;
int main(){
scanf("%d%d",&n,&k);
for(int i=1;i<=n;i++){
scanf("\n%s",S);
int len=strlen(S);
for(int j=0;j<=k;j++) sum[j]=0;
for(int j=0;j<len;j++) sum[j%k]+=(S[len-1-j]-'0');
while(1){
for(int j=0;j<k;j++){
sum[j+1]+=sum[j]/10;
sum[j]%=10;
}
if(!sum[k]) break;
else sum[0]+=sum[k],sum[k]=0;
}
has1[i]=cal(sum,mod1);
has2[i]=cal(sum,mod2);
has3[i]=cal(sum,mod3);
// cout<<has1[i]<<" "<<has2[i]<<" "<<has3[i]<<endl;
// for(int j=k-1;j>=0;j--) cout<<sum[j];
// cout<<endl;
}
for(int j=0;j<k;j++) sum[j]=9;
HAS1=cal(sum,mod1);
HAS2=cal(sum,mod2);
HAS3=cal(sum,mod3);
int ans=0;
for(int i=1;i<=n;i++){
mp[make_tuple(has1[i],has2[i],has3[i])]++;
for(int j=i;j<=n;j++){
for(int c=0;c<=3;c++){
int w1=(1ll*HAS1*c%mod1+mod1-(has1[i]+has1[j])%mod1)%mod1;
int w2=(1ll*HAS2*c%mod2+mod2-(has2[i]+has2[j])%mod2)%mod2;
int w3=(1ll*HAS3*c%mod3+mod3-(has3[i]+has3[j])%mod3)%mod3;
ans+=mp[make_tuple(w1,w2,w3)];
}
}
}
cout<<ans;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3840kb
input:
4 1 0 1 10 17
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 339ms
memory: 34944kb
input:
500 859 7118711592236878297922359501613604144948355616986970837340677671376753603836852811886591300370143151943368529129749813118476151865844255212534355441611481420938483178075143062691345257288242460282715389758789648541099090735875617822348551942134616963557723055980260082230902505269975518146286...
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: -100
Time Limit Exceeded
input:
500 17336 11871159223687829792235950161360414494835561698697083734067767137675360383685281188659130037014315194336852912974981311847615186584425521253435544161148142093848317807514306269134525728824246028271538975878964854109909073587561782234855194213461696355772305598026008223090250526997551814628...
output:
0