#include <bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(0);
register string a,b;
cin>>a>>b;
register int lena=a.length(),lenb=b.length(),lenmax=max(lena,lenb),x[505]={0},y[505]={0},ans[505];
reverse(a.begin(),a.end());
reverse(b.begin(),b.end());
for(register int i=0;i<lena;i++){
x[i]=a[i]-'0';
}
for(register int i=0;i<lenb;i++){
y[i]=b[i]-'0';
}
for(register int i=0;i<lenmax;i++){
ans[i]+=x[i]+y[i];
ans[i+1]=ans[i]/10;
ans[i]%=10;
}
if(ans[lenmax]){
lenmax++;
}
for(register int i=lenmax-1;i>=0;i--){
cout<<ans[i];
}
return 0;
}
不开O2优化全AC,开了反而会随机WA,这是什么原因?
验证码jbrt祭