Submission #3784869


Source Code Expand

#include<cstdio>
#include<iostream>
#define maxn 3*100000+5
#define mod 998244353
using namespace std;
long long int a[maxn],in[maxn];
long long pow(long long x, long long n) {
    long long ret = mod!= 1;
    for (x %= mod; n; n >>= 1, x = x * x % mod)
        if (n & 1) ret = ret * x % mod;
    return ret;
}
 long long int mate( long long int m,  long long int n)
{
    if(m==0) return 1;
    if(n<m) return 0;
    if(n==m)  return 1;
        return a[n]*in[m]%mod*in[n-m]%mod;

}
int main()
{
    long long int sum=0,A,B,K,x,t,N,j,r,i;
    scanf("%lld%lld%lld%lld",&N,&A,&B,&K);
    a[0]=1;
    for(i=1;i<=N;i++)
        a[i]=(a[i-1]*i)%mod;
        in[N]=pow(a[N],mod-2);
        for(i=N-1;i>=0;i--)
            in[i]=in[i+1]*(i+1)%mod;
    if(K==0)
        {
            printf("1\n");
            return 0;
        }
    t=0;
    x=0;
    while(t<=N)
    {
        if((K-t*A)%B) {t++;continue;}
        x=(K-t*A)/B;
        if(x<=N&&t>=0&&x>=0)
        {
            sum=(sum+(mate(t,N)*mate(x,N))%mod)%mod;
        }
       t++;
    }
    printf("%lld\n",sum%mod);
}

Submission Info

Submission Time
Task B - RGB Coloring
User vjudge2
Language C++14 (GCC 5.4.1)
Score 700
Code Size 1076 Byte
Status AC
Exec Time 12 ms
Memory 4992 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:24:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld%lld%lld",&N,&A,&B,&K);
                                          ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 700 / 700
Status
AC × 3
AC × 27
Set Name Test Cases
Sample sample01.txt, sample02.txt, sample03.txt
All sample01.txt, sample02.txt, sample03.txt, in01.txt, in02.txt, in03.txt, in04.txt, in05.txt, in06.txt, in07.txt, in08.txt, in09.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in20.txt, in21.txt, sample01.txt, sample02.txt, sample03.txt
Case Name Status Exec Time Memory
in01.txt AC 9 ms 4992 KB
in02.txt AC 9 ms 4864 KB
in03.txt AC 9 ms 4992 KB
in04.txt AC 9 ms 4992 KB
in05.txt AC 9 ms 4864 KB
in06.txt AC 9 ms 4992 KB
in07.txt AC 9 ms 4992 KB
in08.txt AC 4 ms 2944 KB
in09.txt AC 9 ms 4864 KB
in10.txt AC 8 ms 4096 KB
in11.txt AC 8 ms 4480 KB
in12.txt AC 4 ms 3072 KB
in13.txt AC 7 ms 3712 KB
in14.txt AC 3 ms 2688 KB
in15.txt AC 4 ms 3072 KB
in16.txt AC 3 ms 2560 KB
in17.txt AC 8 ms 3840 KB
in18.txt AC 11 ms 4864 KB
in19.txt AC 12 ms 4864 KB
in20.txt AC 12 ms 4992 KB
in21.txt AC 2 ms 2304 KB
sample01.txt AC 2 ms 2304 KB
sample02.txt AC 2 ms 2304 KB
sample03.txt AC 4 ms 2944 KB