Submission #64377634

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Source Code Expand

#include<cstdio>
#include<algorithm>
using namespace std;
#define ll long long int
#define mod 998244353
struct mint{int _;mint(){_=0;}mint(ll a){_=a%mod;if(_<0)_+=mod;}};
mint operator+(mint a,mint b){a._+=b._;if(a._>=mod)a._-=mod;return a;}
mint operator-(mint a,mint b){a._-=b._;if(a._<0)a._+=mod;return a;}
mint operator*(mint a,mint b){a._=(int)((ll)a._*b._%mod);return a;}
mint operator+=(mint& a,mint b){a._+=b._;if(a._>=mod)a._-=mod;return a;}
mint operator-=(mint& a,mint b){a._-=b._;if(a._<0)a._+=mod;return a;}
mint operator*=(mint& a,mint b){a._=(int)((ll)a._*b._%mod);return a;}
mint pow(mint a,int b){mint c=1;while(b>0){if(b&1)c*=a;a*=a;b>>=1;}return c;}
mint inv(mint a){return pow(a,mod-2);}
mint fac[10010000],ifac[10010000];
mint C(int a,int b){if(b<0||b>a)return 0;return fac[a]*ifac[b]*ifac[a-b];}
mint iC(int a,int b){if(b<0||b>a)return 0;return ifac[a]*fac[b]*fac[a-b];}
void initC(int n){fac[0]=1;for(int i=1;i<=n;i++)fac[i]=fac[i-1]*i;
ifac[n]=inv(fac[n]);for(int i=n;i>=1;i--){ifac[i-1]=ifac[i]*i;}}

int n,k; char ch,lst;
int cnt=0,sum=0,maxv=0,pos=-1;

int main(void)
{
	scanf("%d%d",&n,&k);
	initC(n+100); n-=k;
	for(int i=0;i<k;i++){
		scanf(" %c",&ch);
		if(sum==0) cnt+=2;
		if(ch=='(') sum++;
		if(ch==')') sum--;
		maxv=max(maxv,sum);
		if(lst==')'&&ch==')'&&pos==-1)
			pos=cnt;
		lst=ch;
	}
	if(maxv==1){
		mint ans=0,p2=1;
		for(int i=0;i<=n;i++){
			ans+=p2*C(n-i+k-1,k-1);
			p2+=p2;
		}
		printf("%d\n",ans);
		return 0;
	}
	int a=pos,b=cnt+2-pos;
	mint ans=C(n+a+b/2-1,a+b/2-1);
	for(int i=1;i<=b/2;i++)
		ans+=C(n-1+a+b/2,a+b/2);
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:44:26: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘mint’ [-Wformat=]
   44 |                 printf("%d\n",ans);
      |                         ~^    ~~~
      |                          |    |
      |                          int  mint
Main.cpp:51:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘mint’ [-Wformat=]
   51 |         printf("%d\n",ans);
      |                 ~^    ~~~
      |                  |    |
      |                  int  mint
Main.cpp:26:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   26 |         scanf("%d%d",&n,&k);
      |         ~~~~~^~~~~~~~~~~~~~
Main.cpp:29:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   29 |                 scanf(" %c",&ch);
      |                 ~~~~~^~~~~~~~~~~

Judge Result