oj.uz

Submission #857513

# Submission time Handle Problem Language Result Execution time Memory
857513 2023-10-06T10:23:48 Z Trisanu_Das Radio (COCI22_radio) C++17
30 / 110
 354 ms 61288 KB 
#include <bits/stdc++.h>
using namespace std;
 
void solve1(int n, int q){
    bool a[n + 1]; memset(a, false, sizeof(a));
    while(q--) {
        char t; cin >> t;
        if (t == 'S') {
            int x; cin >> x;
            a[x] = !a[x];
        }else{
            int x, y; cin >> x >> y;
            bool ans = true;
            for (int i = x; i <= y; i++){
                if (!a[i]) continue;
                for (int j = i + 1; j <= y; j++){
                    if (a[j] && __gcd(i, j) > 1) {
                      ans = false; break;
                    }
                }
                if(ans) break;
            }
            if (ans) cout << "NE\n"; else cout << "DA\n";
        }
    }
}
 
void solve2(int n, int q){
    vector<vector<int>> prime(n + 1);
    for (int i = 2; i <= n; ++i){
        if (!prime[i].empty()) continue;
        for (int j = i; j <= n; j += i){
            prime[j].push_back(i);
        }
    }
    vector<int> cnt(n+1);
    vector<bool> active(n+1);
    int k = 0;
    for (int i = 0; i < q; ++i){
        char t; cin >> t;
        if (t == 'S') {
            int x; cin >> x;
            if (!active[x]) {
                for (auto p : prime[x]) {
                    cnt[p]++;
                    if (cnt[p] == 2) k++;
                }
            } else{
                for (auto p : prime[x]){
                    cnt[p]--;
                    if (cnt[p] == 1) k--;
                }
            }
            active[x] = !active[x];
        } else{
            int l, r; cin >> l >> r;
            if (k > 0) cout << "DA\n";
            else cout << "NE\n";
        }
    }
 
}
 
int main() {
    int n, q; cin >> n >> q;
    if (n < 101) solve1(n, q);
    else solve2(n, q);
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 7356 KB Output is correct
2 Correct 188 ms 31568 KB Output is correct
3 Correct 354 ms 61264 KB Output is correct
4 Correct 16 ms 6448 KB Output is correct
5 Correct 137 ms 30772 KB Output is correct
6 Correct 327 ms 61288 KB Output is correct

Subtask #3
0 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -