/* ----------------------------- Mher777 ----------------------------- */
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <fstream>
#include <cassert>
using namespace std;
/* -------------------- Typedefs -------------------- */
typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef float fl;
typedef double db;
typedef long double ld;
/* -------------------- Usings -------------------- */
using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
/* -------------------- Defines -------------------- */
#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define all(x) (x).begin(), (x).end()
/* -------------------- Constants -------------------- */
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18 + 5);
const ll MOD = ll(1e9 + 7);
const ll MOD2 = ll(998244353);
/* -------------------- Functions -------------------- */
void fastio() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
}
void precision(int x) {
cout.setf(ios::fixed | ios::showpoint);
cout.precision(x);
}
ll gcd(ll a, ll b) {
while (b) {
a %= b;
swap(a, b);
}
return a;
}
ll lcm(ll a, ll b) {
return a / gcd(a, b) * b;
}
ll range_sum(ll a, ll b) {
ll dif = a - 1, cnt = b - a + 1;
ll ans = ((b - a + 1) * (b - a + 2)) / 2;
ans += ((b - a + 1) * dif);
return ans;
}
string dec_to_bin(ll a) {
string s = "";
for (ll i = a; i > 0; ) {
ll k = i % 2;
i /= 2;
char c = k + 48;
s += c;
}
if (a == 0) {
s = "0";
}
reverse(all(s));
return s;
}
ll bin_to_dec(string s) {
ll num = 0;
for (int i = 0; i < s.size(); i++) {
num *= 2ll;
num += (s[i] - '0');
}
return num;
}
int isPrime(ll a) {
if (a == 1) return 0;
for (ll i = 2; i * i <= a; i++) {
if (a % i == 0) return 0;
}
return 1;
}
ll binpow(ll a, ll b) {
if (!a) return 0;
ll ans = 1;
while (b) {
if (b & 1) {
ans *= a;
}
b >>= 1;
a *= a;
}
return ans;
}
ll binpow_by_mod(ll a, ll b, ll mod) {
if (!a) return 0;
ll ans = 1;
while (b) {
if (b & 1) {
ans *= a;
ans %= mod;
}
b >>= 1;
a *= a;
a %= mod;
}
return ans;
}
/*-------------------- Solution -------------------- */
const int N = 500005;
int n, q;
string s;
pii t[N * 4], t_rev[N * 4];//first->C-T,second->ans
pii merge(pii a, pii b) {
return { b.ff + max(0,a.ff - b.ss),a.ss + max(0,b.ss - a.ff) };
}
void bld(int l = 0, int r = n - 1, int pos = 1) {
if (l == r) {
if (s[l] == 'C') {
t[pos] = { 1,0 };
t_rev[pos] = { 1,0 };
}
else {
t[pos] = { 0,1 };
t_rev[pos] = { 0,1 };
}
return;
}
int mid = (l + r) / 2;
bld(l, mid, 2 * pos);
bld(mid + 1, r, 2 * pos + 1);
t[pos] = merge(t[2 * pos], t[2 * pos + 1]);
t_rev[pos] = merge(t_rev[2 * pos + 1], t_rev[2 * pos]);
}
pii qry(int l, int r, int type, int tl = 0, int tr = n - 1, int pos = 1) {
if (l == tl && r == tr) {
return type == 1 ? t[pos] : t_rev[pos];
}
int mid = (tl + tr) / 2;
if (mid >= r) {
return qry(l, r, type, tl, mid, 2 * pos);
}
if (mid < l) {
return qry(l, r, type, mid + 1, tr, 2 * pos + 1);
}
if (type == 1) {
return merge(qry(l, mid, type, tl, mid, 2 * pos), qry(mid + 1, r, type, mid + 1, tr, 2 * pos + 1));
}
else {
return merge(qry(mid + 1, r, type, mid + 1, tr, 2 * pos + 1), qry(l, mid, type, tl, mid, 2 * pos));
}
}
void slv() {
cin >> n >> s >> q;
bld();
while (q--) {
int l, r;
cin >> l >> r;
cout << max(qry(l - 1, r - 1, 1).ss, qry(l - 1, r - 1, 2).ss) << '\n';
}
}
void cs() {
int tstc = 1;
//cin >> tstc;
while (tstc--) {
slv();
}
}
void precalc() {
return;
}
int main() {
fastio();
precalc();
//precision(0);
cs();
return 0;
}
Compilation message
election.cpp: In function 'll range_sum(ll, ll)':
election.cpp:92:21: warning: unused variable 'cnt' [-Wunused-variable]
92 | ll dif = a - 1, cnt = b - a + 1;
| ^~~
election.cpp: In function 'll bin_to_dec(std::string)':
election.cpp:115:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
115 | for (int i = 0; i < s.size(); i++) {
| ~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2396 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
