Submission #65654443

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
const int mod=998244353;
int qpow(int a,int b){
    int c=1;
    for(;b;b>>=1){
        if(b&1)c=1ll*a*c%mod;
        a=1ll*a*a%mod;
    }
    return c;
}
const int N=5e6;
int jc[5001000],ij[5001000];
int C(int a,int b){
    return 1ll*jc[a]*ij[b]%mod*ij[a-b]%mod;
}
int main(){
    jc[0]=1;
    for(int i=1;i<=N;i++)jc[i]=1ll*i*jc[i-1]%mod;
    ij[N]=qpow(jc[N],mod-2);
    for(int i=N;i;i--)ij[i-1]=1ll*i*ij[i]%mod;
    int a,b,c,d;
    scanf("%d%d%d%d",&a,&b,&c,&d);
    int ans=0;
    for(int i=1;i<=c+1;i++){
        int t1=C(c+d-i,d-1);
        t1=1ll*t1*C(a+i-1+b,b)%mod;
        (ans+=t1)%=mod;
    }
    printf("%d\n",ans);
    return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:23:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   23 |     scanf("%d%d%d%d",&a,&b,&c,&d);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Judge Result