Submission #50419791

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
using ll = long long;
using ld = long double;
using ull = unsigned long long;
#define endl "\n"
typedef pair<int, int> Pii;
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REP3(i, m, n) for (int i = (m); (i) < int(n); ++ (i))
#define rep(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define ALL(x) begin(x), end(x)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(s) (s).begin(),(s).end()
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
#define rever(vec) reverse(vec.begin(), vec.end())
#define sor(vec) sort(vec.begin(), vec.end())
#define fi first
#define FOR_(n) for (ll _ = 0; (_) < (ll)(n); ++(_))
#define FOR(i, n) for (ll i = 0; (i) < (ll)(n); ++(i))
#define se second
#define pb push_back
#define P pair<ll,ll>
#define PQminll priority_queue<ll, vector<ll>, greater<ll>>
#define PQmaxll priority_queue<ll,vector<ll>,less<ll>>
#define PQminP priority_queue<P, vector<P>, greater<P>>
#define PQmaxP priority_queue<P,vector<P>,less<P>>
#define NP next_permutation
//const ll mod = 1000000009;
const ll mod = 998244353;
//const ll mod = 1000000007;
const ll inf = 4100000000000000000ll;
const ld eps = ld(0.00000000001);
static const long double pi = 3.141592653589793;
template<class T>void vcin(vector<T> &n){for(int i=0;i<int(n.size());i++) cin>>n[i];}
template<class T,class K>void vcin(vector<T> &n,vector<K> &m){for(int i=0;i<int(n.size());i++) cin>>n[i]>>m[i];}
template<class T>void vcout(vector<T> &n){for(int i=0;i<int(n.size());i++){cout<<n[i]<<" ";}cout<<endl;}
template<class T>void vcin(vector<vector<T>> &n){for(int i=0;i<int(n.size());i++){for(int j=0;j<int(n[i].size());j++){cin>>n[i][j];}}}
template<class T>void vcout(vector<vector<T>> &n){for(int i=0;i<int(n.size());i++){for(int j=0;j<int(n[i].size());j++){cout<<n[i][j]<<" ";}cout<<endl;}cout<<endl;}
void yes(bool a){cout<<(a?"yes":"no")<<endl;}
void YES(bool a){cout<<(a?"YES":"NO")<<endl;}
void Yes(bool a){cout<<(a?"Yes":"No")<<endl;}
void possible(bool a){ cout<<(a?"possible":"impossible")<<endl; }
void Possible(bool a){ cout<<(a?"Possible":"Impossible")<<endl; }
void POSSIBLE(bool a){ cout<<(a?"POSSIBLE":"IMPOSSIBLE")<<endl; }
#define FOR_R(i, n) for (ll i = (ll)(n)-1; (i) >= 0; --(i))
template<class T>auto min(const T& a){ return *min_element(all(a)); }
template<class T>auto max(const T& a){ return *max_element(all(a)); }
template<class T,class F>void print(pair<T,F> a){cout<<a.fi<<" "<<a.se<<endl;}
template<class T>bool chmax(T &a,const T b) { if (a<b) { a=b; return 1; } return 0;}
template<class T>bool chmin(T &a,const T b) { if (b<a) { a=b; return 1; } return 0;}
template<class T> void ifmin(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}}
template<class T> void ifmax(T t,T u){if(t>u){cout<<-1<<endl;}else{cout<<t<<endl;}}
ll fastgcd(ll u,ll v){ll shl=0;while(u&&v&&u!=v){bool eu=!(u&1);bool ev=!(v&1);if(eu&&ev){++shl;u>>=1;v>>=1;}else if(eu&&!ev){u>>=1;}else if(!eu&&ev){v>>=1;}else if(u>=v){u=(u-v)>>1;}else{ll tmp=u;u=(v-u)>>1;v=tmp;}}return !u?v<<shl:u<<shl;}
ll modPow(ll a, ll n, ll mod) { if(mod==1) return 0;ll ret = 1; ll p = a % mod; while (n) { if (n & 1) ret = ret * p % mod; p = p * p % mod; n >>= 1; } return ret; }
vector<ll> divisor(ll x){ vector<ll> ans; for(ll i = 1; i * i <= x; i++){ if(x % i == 0) {ans.push_back(i); if(i*i!=x){ ans.push_back(x / ans[i]);}}}sor(ans); return ans; }
ll pop(ll x){return __builtin_popcountll(x);}
ll poplong(ll x){ll y=-1;while(x){x/=2;y++;}return y;}
P hyou(P a){ll x=fastgcd(abs(a.fi),abs(a.se));a.fi/=x;a.se/=x;if(a.se<0){a.fi*=-1;a.se*=-1;}return a;}
P Pplus(P a,P b){ return hyou({a.fi*b.se+b.fi*a.se,a.se*b.se});}
P Ptimes(P a,ll b){ return hyou({a.fi*b,a.se});}
P Ptimes(P a,P b){ return hyou({a.fi*b.fi,a.se*b.se});}
P Pminus(P a,P b){ return hyou({a.fi*b.se-b.fi*a.se,a.se*b.se});}
P Pgyaku(P a){ return hyou({a.se,a.fi});}
#define die(a) cout<<a<<endl,exit(0);
#define dier(a) {cout<<a<<endl;return;}
#define diec(a) {cout<<a<<endl;continue;}
template<class T>pair<T,ll> maxid(vector<T> a){ll v=a[0],id=0;for(int i=1;i<a.size();i++){if(chmax(v,a[i])){id=i;}}return {v,id};}
template<class T>pair<T,ll> minid(vector<T> a){ll v=a[0],id=0;for(int i=1;i<a.size();i++){if(chmin(v,a[i])){id=i;}}return {v,id};}
template<class T> vector<pair<T,ll>> RLE(vector<T> a){vector<pair<T,ll>> r;ll v=1;for(int i=1;i<int(a.size());i++){if(a[i]==a[i-1]){v++;}else{r.pb({a[i-1],v});v=1;}}r.pb({a.back(),v});return r;}
void compress(vector<ll> &arr){ll n=arr.size();map<ll,ll> m;for(int i=0;i<n;i++){m[arr[i]]=0;}ll s=0;for(auto& i:m){i.second=s++;}for(int i=0;i<n;i++){arr[i]=m[arr[i]];}}
vector<pair<char,ll>> RLE(string a){vector<pair<char,ll>> r;ll v=1;for(int i=1;i<int(a.size());i++){if(a[i]==a[i-1]) v++;else{r.pb({a[i-1],v});v=1;}}r.pb({a.back(),v});return r;}
template <int N> struct ndFORimpl {
  std::array<int, N> v;
  ndFORimpl(std::array<int, N> v_) : v(v_) {}
  struct ndFORitr {
    const std::array<int, N> &v;
    std::array<int, N> tmp;
    bool is_end;
    ndFORitr(const std::array<int, N> &v_) : v(v_), tmp(), is_end(false) {}
    bool operator!=(const ndFORitr &) const { return !is_end; }
    void operator++() {
      int pos = N - 1;
      while (pos != -1) {
        tmp[pos] += 1;
        if (tmp[pos] == v[pos]) {
          tmp[pos] = 0;
          pos -= 1;
        } else {
          break;
        }
      }
      if (pos == -1) {
        is_end = true;
      }
    }
    const std::array<int, N> &operator*() const { return tmp; }
  };
  ndFORitr begin() const { return ndFORitr(v); }
  ndFORitr end() const { return ndFORitr(v); }
};

template <class... Ts> auto ndFOR(Ts... v) {
  return ndFORimpl<std::tuple_size<std::tuple<Ts...>>::value>({v...});
}
void cincout(){
  ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
  cout<< fixed << setprecision(15);
}
ll f(ll a,ll b){
  if(a==b) return 0;
  if(a<b) return 1;
  return 2;
}
using mint = modint998244353;
int main(){
  cincout();
  ll n;
  cin>>n;
  string s;
  cin>>s;
  ll ans=1;
  vector<ll> p,q;
  ll a=0,b=0;
  p.pb(0);
  q.pb(0);
  for(int i=1;i<s.size();i++){
    if(s[i]=='A') a++;
    else b++;
    p.pb(a);
    q.pb(b);
  }
  for(int i=1;i<s.size();i++){
    ll u=p[i-1],v=q[i-1];
    ll x=p[i],y=q[i];
    if(s[0]=='A') u++;
    else v++;
    if(f(u,v)!=f(x,y)) ans++;
  }
  cout<<ans<<endl;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:133:16: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
  133 |   for(int i=1;i<s.size();i++){
      |               ~^~~~~~~~~
Main.cpp:139:16: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
  139 |   for(int i=1;i<s.size();i++){
      |               ~^~~~~~~~~

Judge Result