Submission #66528905

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Source Code Expand

#include <bits/stdc++.h>
#define _F(x,y,z) for(int x=y;x<=z;x++)
#define F_(x,z,y) for(int x=z;x>=y;x--)
#define TF(x,y,z) for(int x=head[y],z;x;x=nex[x])
#define GF(x,y,z) for(int x:z[y])

using namespace std;

typedef long long ll;
typedef double dou;
typedef const int ci;
typedef pair<int,int> pii;

ci maxn=2e6+10;

int n,l,a[maxn],cnt[maxn];
ll ans=0;
void work()
{
	scanf("%d%d",&n,&l);
	a[1]=1;
	cnt[1]++;
	_F(i,2,n)
	{
		scanf("%d",&a[i]);
		a[i]=(a[i-1]+a[i]-1)%l+1;
		cnt[a[i]]++;
	}
	if(l%3)
	{
		puts("0");
		return ;
	}
	_F(i,1,l/3)
	{
		ans+=1ll*cnt[i]*cnt[(i+l/3-1)%l+1]*cnt[(i+2*l/3-1)%l+1];
//		printf("%d %d %d\n",cnt[i],cnt[(i+l/3-1)%l+1],cnt[(i+2*l/3-1)%l+1]);
	}
	cout<<ans<<endl;
}
int main()
{
//	int t;
//	scanf("%d",&t);
//	while(t--)
		work();
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘void work()’:
Main.cpp:20:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   20 |         scanf("%d%d",&n,&l);
      |         ~~~~~^~~~~~~~~~~~~~
Main.cpp:25:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   25 |                 scanf("%d",&a[i]);
      |                 ~~~~~^~~~~~~~~~~~

Judge Result