TLE了吧？
by 小粉兔 @ 2017-11-02 22:34:11
@[小粉兔](/space/show?uid=10703) RE比较多
by Have_a_nice_day @ 2017-11-02 22:59:55
@[小粉兔](/space/show?uid=10703) 正解是怎么样？谢谢大佬
by Have_a_nice_day @ 2017-11-02 23:00:31
```cpp
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cctype>
#define int long long
using namespace std;
int read()
{
int sum;char c;bool neg=0;
while(!isdigit(c=getchar()))if(c=='-')neg=1;sum=c-'0';
while(isdigit(c=getchar())){sum*=10;sum+=c-'0';}
return neg?-sum:sum;
}
int map[410][410],mod,cnt[1000010][2];
signed main()
{
int i,j,k,n,m,ans=0,sum,mark=0;
n=read();m=read();mod=read();
for(i=1;i<=n;i++)for(j=1;j<=m;j++)map[i][j]=(map[i][j-1]+read())%mod;
for(i=1;i<=m;i++)
{
for(j=i;j<=m;j++)
{
sum=0;
mark=i*m+j;
cnt[0][0]=1;cnt[0][1]=mark;
for(k=1;k<=n;k++)
{
(sum+=map[k][j]-map[k][i-1]+mod)%=mod;
if(cnt[sum][1]==mark)
{
ans+=cnt[sum][0];
cnt[sum][0]++;
}
else
{
cnt[sum][1]=mark;
cnt[sum][0]=1;
}
}
}
}
printf("%lld\n",ans);
return 0;
}
```
by feng_chengjie @ 2017-11-02 23:42:26
@[feng\_chengjie](/space/show?uid=36294) 谢谢。请问cnt[sum][0]和cnt[sum][1]分别是什么意思啊
by Have_a_nice_day @ 2017-11-03 09:46:37
```cpp
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cmath>
#include<map>
#define LL long long
using namespace std;
LL n,m,k,l,a[550][550],f[550][550],cnt[1000100],num[1000100];
bool mp[1000100];
LL ans,tot;
int main(){
scanf("%lld%lld%lld",&n,&m,&k);
for (int i=1;i<=n;i++)
for (int j=1;j<=m;j++) scanf("%lld",&a[i][j]);
for (int i=1;i<=n;i++)
for (int j=1;j<=m;j++) f[i][j]=(f[i][j-1]+f[i-1][j]-f[i-1][j-1]+a[i][j])%k;
for (int l=1;l<=m;l++)
for (int r=l;r<=m;r++){
for (int j=1;j<=tot;j++) cnt[num[j]]=0;
tot=0;
for (int j=1;j<=n;j++){
LL t=(f[j][r]-f[j][l-1]+2*k)%k;
num[++tot]=t;
ans+=cnt[t];
cnt[t]++;
}
ans+=cnt[0];
}
printf("%lld\n",ans);
}
```
by Have_a_nice_day @ 2017-11-03 11:12:50
优化一下能过的
by Have_a_nice_day @ 2017-11-03 11:32:53