Submission #1340098

#	Time	Username	Problem	Language	Result	Execution time	Memory
1340098		asim	Tornjevi (COCI25_tornjevi)	C++20	61 / 110	1096 ms	1916 KiB

Main

#include <bits/stdc++.h>
using namespace std; 

#define int long long
#define pb push_back
#define all(v) v.begin(), v.end()

void solve() {
    int n, q; cin >> n >> q;
    string s; cin >> s;
    int pref[n + 1];
    pref[0] = 0;
    for(int i = 1; i <= n; i++) {
        pref[i] = pref[i - 1] + (s[i - 1] == 'P' ? 1 : 0);
    }
    while(q--) {
        int l, r; cin >> l >> r;
        int a = pref[r] - pref[l - 1], b = r - l + 1 - a;
        l--, r--;
        string g = s;
        if(a == r - l + 1 or !a) {
            cout << r - l + 1 << '\n';
            continue;
        }
        int cnt = 0;
        while(true) {
            char c;
            bool ok = false;
            for(int i = r; i >= l; i--) {
                if(!ok) {
                    if(g[i] != 'X') {
                        c = g[i];
                        if(c == 'P')a--;
                        else b--;
                        g[i] = 'X';
                        ok = true;
                    }
                }
                else {
                    if(g[i] != 'X') {
                        if(c != g[i]) {
                            c = g[i];
                            if(c == 'P')a--;
                            else b--;
                            g[i] = 'X';
                        }
                    }
                }
            }
            if(!ok)break;
            cnt++;
            if(a == 0 or b == 0) {
                cnt += a + b;
                break;
            }
        }
        cout << cnt << '\n';
    }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    
    int T = 1; 
    //cin >> T;
    while (T--) solve();
}

• Subtask 0: 0 / 0
• Subtask 1: 23 / 23
• Subtask 2: 38 / 38
• Subtask 3: 0 / 25
• Subtask 4: 0 / 24