Educational Codeforces Round 110 (Rated for Div. 2) C. Unstable String
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| #include <bits/stdc++.h>
#pragma optimization_level 3
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
struct PairHash {inline std::size_t operator()(const std::pair<int,int> & v) const {return v.first*31+v.second;}};
#define MAX_N 202020
#define INF 987654321
#define EPS 1e-9
#define ll long long
#define pll pair<ll, ll>
#define vpll vector<pll>
#define vall3 vector<array<ll,3>>
#define all3 array<ll,3>
#define all5 array<ll,5>
#define vall5 vector<all5>
#define vll vector<ll>
#define vs vector<string>
#define usll unordered_set<ll>
#define uspll unordered_set<pll, PairHash>
#define vvs vector<vs>
#define vvll vector<vll>
#define all(a) begin(a), end(a)
using namespace std;
ll solve(string& s) {
ll res = 0;
ll turn = -1, cons = 0, cnt = 0;
for(auto& ch : s) {
if(ch == '1') {
if(turn == 0) {
cnt = cons + 1;
res += cnt;
} else {
cnt++;
res += cnt;
}
turn = 0;
cons = 0;
} else if(ch == '0') {
if(turn == 1) {
cnt = cons + 1;
res += cnt;
} else {
cnt++;
res += cnt;
}
turn = 1;
cons = 0;
} else if(ch == '?') {
cons++;
cnt++;
res += cnt;
if(turn == 1) turn = 0;
else if(turn == 0) turn = 1;
}
}
return res;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
ll tc = 1;
cin>>tc;
for(ll i = 1; i <= tc; i++) {
string s;
cin>>s;
cout<<solve(s)<<endl;
}
return 0;
}
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