QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#590081 | #8340. 3 Sum | DBsoleil | WA | 84ms | 3960kb | C++20 | 962b | 2024-09-25 21:26:26 | 2024-09-25 21:26:26 |
Judging History
answer
#include<bits/stdc++.h>
#define pb push_back
using namespace std;
typedef long long ll;
const int N=505,M=20005;
const ll MOD=1e9+7;
int n,k,ans,mod;
ll a[N];
char s[M];
ll getll()
{
scanf("%s",s+1);
ll res=0,len=strlen(s+1);
for(int i=len;i>=1;i-=k)
{
ll nw=0;
for(int j=max(i-k+1,1);j<=i;j++) nw=(nw*10+s[j]-'0')%MOD;
res+=nw;
}
return res%MOD;
}
bool check(ll x)
{
return (x==mod||x==mod*2%MOD||x==0);
}
void input()
{
scanf("%d%d",&n,&k),mod=1;
for(int i=1;i<=k;i++) mod=mod*10%MOD;
mod=(mod-1+MOD)%MOD;
for(int i=1;i<=n;i++) a[i]=getll();
for(int i=1;i<=n;i++) cerr<<' '<<a[i];
cerr<<endl;
}
void solve()
{
input();
for(int i=1;i<=n;i++) for(int j=i;j<=n;j++) for(int k=j;k<=n;k++)
{
ll sum=(a[i]+a[j]+a[k])%MOD;
if(check(sum)) ans++;
}
printf("%d\n",ans);
}
int main()
{
solve();
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3960kb
input:
4 1 0 1 10 17
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 34ms
memory: 3784kb
input:
500 859 7118711592236878297922359501613604144948355616986970837340677671376753603836852811886591300370143151943368529129749813118476151865844255212534355441611481420938483178075143062691345257288242460282715389758789648541099090735875617822348551942134616963557723055980260082230902505269975518146286...
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 84ms
memory: 3864kb
input:
500 17336 11871159223687829792235950161360414494835561698697083734067767137675360383685281188659130037014315194336852912974981311847615186584425521253435544161148142093848317807514306269134525728824246028271538975878964854109909073587561782234855194213461696355772305598026008223090250526997551814628...
output:
0
result:
ok 1 number(s): "0"
Test #4:
score: -100
Wrong Answer
time: 68ms
memory: 3852kb
input:
500 1 751324443898124078584847834484321089092662321556147445230263526014359393841194947303407593948729802551881289193716611867931891257925091769456350249725997883453296895094445731130479434019358742162771547784250401546380268386074363779242500860317042151185119666027858022664683818314351285215150806...
output:
0
result:
wrong answer 1st numbers differ - expected: '2327631', found: '0'