#include <immintrin.h>
#include <cstdint>
#include <iostream>
using namespace std;
using UINT_32 = uint32_t;
template<uint64_t MOD>
constexpr uint add(UINT_32 a,UINT_32 b) {
return a < MOD - b ? a + b : a - (MOD - b);
}
int main() {
__m512d x;
int a,b;
cin>>a>>b;
cout<<add<998244353>(a,b);
}