2938.
蛤==
这题会medium是因为要开long long吗
就从头扫过去
看到0
看过几个1就加
using ll = long long;
class Solution {
public:
long long minimumSteps(string s) {
ll res = 0;
int cur1 = 0;
for(char& c: s){
if(c == '1') cur1++;
else res += cur1;
}
return res;
}
};

好久没写了LL

是你太强