#include <bits/stdc++.h> #define FOR(i, beg, ed, etr) for(ll i = beg;i <= ed;i += etr) #define FORN(i, beg, ed, etr) for(ll i = beg;i >= ed;i -= etr) #define all(x) x.begin(), x.end() #define F first #define pb push_back #define S second #define con continue using namespace std; typedef long long ll; typedef pair<ll,ll> pii; typedef pair<ll,ll> pll; typedef double db; typedef long double ld; const ll inf = 1e9; const ll INF = 1e18; const ll N = 5e4 + 5; const ll MOD = 1e9 + 7; int a[N],pre[N]; void solve(){ int n;cin >> n; FOR(i, 1, n, 1){ char c;cin >> c; if(c == 'T')a[i] = -1; else a[i] = 1; pre[i] = pre[i-1] + a[i]; } int q;cin >>q ; while(q--){ int l,r;cin >> l >> r; int ans = 0; int cnt = 0,sum = (pre[r] - pre[l-1]); vector <int> v = {}; FOR(i, l, r, 1){ cnt += a[i]; v.pb(a[i]); while(cnt < 0){ v.pop_back(); ans++; cnt++; } } cnt = 0; int mx = 0; FORN(i, v.size() - 1, 0, 1){ cnt += v[i]; if(cnt < 0)mx = max(mx,abs(cnt)); } cout << (ans + mx) << '\n'; } } main(){ ios_base::sync_with_stdio(0); cin.tie(0); // freopen("optmilk.in","r",stdin); // freopen("optmilk.out","w",stdout); ll abd = 1; // cin >> abd; FOR(i, 1, abd, 1){ solve(); } }

election.cpp:53:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   53 | main(){
      | ^~~~