2017 济南精英班 Day1

不管怎么掰都是n*m-1

#include<cstdio>
using namespace std;
int main()
{
    freopen("bpmp.in","r",stdin);
    freopen("bpmp.out","w",stdout);
    int n,m;
    scanf("%d%d",&n,&m);
    int ans=(1ll*n*m-1)%998244353;
    printf("%d",ans);
}

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