#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
// #include <atcoder/all>
#include <cstdio>
using namespace std;
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define blt(x) __builtin_popcount(x)
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define pb push_back
#define popf pop_front
#define popb pop_back
#define ld long double
#define ll long long
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
void print(long double t) {cerr << t;}
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T> void print(T v[],T n) {cerr << "["; for(int i = 0; i < n; i++) {cerr << v[i] << " ";} cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
// for random generations
mt19937 myrand(chrono::steady_clock::now().time_since_epoch().count());
// mt19937 myrand(131);
// for grid problems
int dx[8] = {1,0,-1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};
char ch[4] = {'v', '>', '^', '<'};
long long ka() {
long long x = 0;
bool z = false;
while (1)
{
char y = getchar();
if (y == '-')
z = true;
else if ('0' <= y && y <= '9')
x = x * 10 + y - '0';
else
{
if (z)
x *= -1;
return x;
}
}
}
// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
fastIO();
if (str != "") {
freopen((str + ".in").c_str(), "r", stdin);
freopen((str + ".out").c_str(), "w", stdout);
} else if(str == "input") {
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
}
}
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
struct segTreeMin {
vector<long long> mTree;
int size;
void init(long long n) {
size = 1;
while(size < n) {
size *= 2;
}
mTree.assign(2 * size - 1, 0);
}
void upd(int u, long long v, int x, int lx, int rx) { // set value at pos u
if(rx - lx == 1) {
mTree[x] = v;
return;
}
int m = (lx + rx) / 2;
if(u < m) {
upd(u, v, 2 * x + 1, lx, m);
}else {
upd(u, v, 2 * x + 2, m, rx);
}
mTree[x] = min(mTree[2 * x + 1], mTree[2 * x + 2]);
}
void upd(int u, long long v) {
upd(u, v, 0, 0, size);
}
long long qry (int l, int r, int x, int lx, int rx) { // range queries
if(l >= rx || lx >= r) {
return INT32_MAX;
}
if(lx >= l && r >= rx) {
return mTree[x];
}
int m = (rx + lx) / 2;
long long s1 = qry(l, r, 2 * x + 1, lx, m);
long long s2 = qry(l, r, 2 * x + 2, m, rx);
return min(s1, s2);
}
long long qry(int l, int r) {
return qry(l, r, 0, 0, size);
}
};
segTreeMin seg_p, seg_s;
const int N = 5e5 + 10;
char s[N];
void solve_() {
int n; cin >> n;
int p = 0;
vector<int> pref(n + 1), indices;
map<int, vector<int>> mp;
mp[0].push_back(0);
seg_p.init(n + 1);
seg_s.init(n + 1);
for(int i = 1; i <= n; i++) {
cin >> s[i];
if(s[i] == 'T') p--, indices.push_back(i);
else p++;
seg_p.upd(i, p);
mp[p].push_back(i);
pref[i] = pref[i - 1] + (s[i] == 'C');
}
int q; cin >> q;
p = 0;
for(int i = n; i >= 1; i--) {
if(s[i] == 'T') p--;
else p++;
seg_s.upd(i, p);
}
while(q--) {
int l, r; cin >> l >> r;
int min_pref = seg_p.qry(l, r + 1);
int pref_sub = seg_p.qry(l - 1, l);
int L = -1, R = -1;
if(min_pref - pref_sub < 0) {
int cnt = abs(min_pref - pref_sub);
auto it = *lower_bound(all(mp[-1 + pref_sub]), l);
L = it;
auto it_ = lower_bound(all(indices), L) - indices.begin();
R = indices[it_ + cnt - 1];
}
int pat = 0;
if(L != -1 && R != -1) {
pat = R - L + 1;
int pi = 0;
if(R + 1 <= r) {
int min_suf = seg_s.qry(R + 1, r + 1);
int suf_sub = seg_s.qry(r + 1, r + 2);
int to_add = 0;
if(min_suf - suf_sub < 0) {
to_add = abs(min_suf - suf_sub);
}
pat += to_add;
}
if(l <= L - 1) {
int min_suf = seg_s.qry(l, L);
int suf_sub = seg_s.qry(L, L + 1);
min_suf -= suf_sub;
int to_add = 0;
if(min_suf < 0 && abs(min_suf) > suf_sub + pat) {
to_add = abs( abs(min_suf) - (suf_sub + pat));
}
pat += to_add;
}
} else {
int min_suf = seg_s.qry(l, r + 1);
int suf_sub = seg_s.qry(r + 1, r + 2);
int to_add = 0;
if(min_suf - suf_sub < 0) {
to_add = abs(min_suf - suf_sub);
}
pat += to_add;
}
cout << pat << '\n';
}
}
int main() {
setIO();
auto solve = [&](int test_case)-> void {
while(test_case--) {
solve_();
}
};
int test_cases = 1;
// cin >> test_cases;
solve(test_cases);
return 0;
}
Compilation message
election.cpp: In function 'void solve_()':
election.cpp:206:11: warning: unused variable 'pi' [-Wunused-variable]
206 | int pi = 0;
| ^~
election.cpp: In function 'void setIO(std::string)':
election.cpp:90:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
90 | freopen((str + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:91:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
91 | freopen((str + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:93:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
93 | freopen("input.txt", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:94:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
94 | freopen("output.txt", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
476 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
476 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
476 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
