#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;
template<class T> using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
template <class T> bool ckmin(T& a, const T& b) {return a > b ? a = b, true : false;}
template <class T> bool ckmax(T& a, const T& b) {return a < b ? a = b, true : false;}
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val);}
int n, m, k;
void solve(int test_case){
int i, j;
ordered_set<pair<int, char>> s;
cin >> n >> m;
s.insert({mod*mod, (char)125});
for(i=0;i<n;i++){
char c;
cin >> c;
s.insert({i*mod+10000000, c});
}
while(m--){
char type;
cin >> type;
// for(auto [x, y] : s )cout << y;
// cout << '\n';
if(type == 'a'){
int l, r;
cin >> l >> r;
l--,r--;
auto x = s.find_by_order(l);
char val = (*x).ss;
s.erase(x);
x = s.find_by_order(r);
int dist;
if(x == s.begin()){
dist = (*x).ff/2;
}else {
auto y = x;y--;
dist = ((*x).ff+(*y).ff)/2;
}
s.insert({dist, val});
assert((*s.find_by_order(r)).ss == val);
}else {
int p;
cin >> p;
p--;
char ans = (*s.find_by_order(p)).ss;
cout << ans << '\n';
}
}
return;
}
signed main(){
FASTIO;
#define MULTITEST 0
#if MULTITEST
int _T;
cin >> _T;
for(int T_CASE = 1; T_CASE <= _T; T_CASE++)
solve(T_CASE);
#else
solve(1);
#endif
return 0;
}
Compilation message
collider.cpp: In function 'void solve(long long int)':
collider.cpp:22:9: warning: unused variable 'j' [-Wunused-variable]
22 | int i, j;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
7 ms |
364 KB |
Output is correct |
| 3 |
Correct |
77 ms |
6764 KB |
Output is correct |
| 4 |
Correct |
722 ms |
51308 KB |
Output is correct |
| 5 |
Correct |
753 ms |
51428 KB |
Output is correct |
| 6 |
Correct |
855 ms |
57820 KB |
Output is correct |
| 7 |
Correct |
969 ms |
64256 KB |
Output is correct |
| 8 |
Correct |
978 ms |
64364 KB |
Output is correct |
| 9 |
Correct |
968 ms |
64236 KB |
Output is correct |
| 10 |
Correct |
935 ms |
64236 KB |
Output is correct |
