提出 #38970505

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ソースコード 拡げる

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
const int maxn=200005,mod=998244353;
int A[maxn*2];
int fac[maxn*2],iac[maxn*2];
int binom(int n,int m){
	return 1ll*iac[m]*iac[n-m]%mod*fac[n]%mod;
}
int main(){
	fac[0]=fac[1]=iac[0]=iac[1]=1;
	for(int i=2;i<maxn*2;++i)iac[i]=1ll*(mod-mod/i)*iac[mod%i]%mod;
	for(int i=2;i<maxn*2;++i)iac[i]=1ll*iac[i-1]*iac[i]%mod,fac[i]=1ll*fac[i-1]*i%mod;
	int N,K;scanf("%d%d",&N,&K);
	for(int i=1;i<=N;++i){
		int a;scanf("%d",&a);A[a]=true;
	}
	int sum=0,ans=0;
	for(int i=0;i<maxn*2;++i){
		if(K-sum-1<0)break;
		ans+=binom(K-sum-1+i,i);
		if(ans>=mod)ans-=mod;
		sum+=!A[i];
	}
	printf("%d\n",ans);
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   16 |  int N,K;scanf("%d%d",&N,&K);
      |          ~~~~~^~~~~~~~~~~~~~
./Main.cpp:18:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   18 |   int a;scanf("%d",&a);A[a]=true;
      |         ~~~~~^~~~~~~~~

ジャッジ結果