제출 #359068

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
359068		valerikk	가로등 (APIO19_street_lamps)	C++17	0 / 100	1982 ms	40428 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

const int SQ = 700, N = 3e5 + 7;

int n, q;
string s;
int a[N], b[N];
string typ[N];
vector<int> v[N];
vector<int> qr[N];
vector<int> bl[N];
int l[N], r[N];
int clr[N], lst[N];
int ans[N];

void psh(int k) {
    if (clr[k] != -1) {
        for (int pos = l[k]; pos < r[k]; pos++) lst[pos] = clr[k];
        clr[k] = -1;
        bl[k].clear();
        for (int pos = l[k]; pos < r[k]; pos++) bl[k].push_back(lst[pos]);
    }
}

int main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> q >> s;
    for (int i = 0; i < n; i++)
        v[i].push_back(0);
    for (int i = 0; i < q; i++) {
        cin >> typ[i];
        if (typ[i] == "toggle") {
            int pos;
            cin >> pos;
            pos--;
            v[pos].push_back(i + 1);
        } else {
            cin >> a[i] >> b[i];
            a[i]--;
            b[i]--;
            qr[a[i]].push_back(i);
        }
    }
    int blcks = 0;
    for (int i = 0, pos = 0; i <= q; i += SQ, pos += 1) {
        blcks++;
        l[pos] = i, r[pos] = min(q + 1, i + SQ);
        for (int j = l[pos]; j < r[pos]; j++) {
            lst[j] = n;
            bl[pos].push_back(n);
        }
        clr[pos] = -1;
    }
    for (int i = n - 1; i >= 0; i--) {
        int cur = s[i] - '0';
        for (int j = 0; j < v[i].size(); j++) {
            if (cur == 0) {
                int L = v[i][j], R = j == (int)v[i].size() - 1 ? q + 1 : v[i][j + 1];
                for (int k = 0; k < blcks; k++) {
                    // psh(k);
                    if (l[k] >= R || r[k] <= L) continue;
                    if (l[k] >= L && r[k] <= R) {
                        clr[k] = i;
                    } else {
                        psh(k);
                        for (int pos = max(l[k], L); pos < min(r[k], R); pos++) lst[pos] = i;
                        bl[k].clear();
                        for (int pos = l[k]; pos < r[k]; pos++) bl[k].push_back(lst[pos]);
                        sort(bl[k].begin(), bl[k].end());
                    }
                }
            }
            cur ^= 1;
        }
        for (int x : qr[i]) {
            for (int pos = 0; pos < blcks; pos++) {
                // psh(pos);
                if (l[pos] > x) break;
                if (r[pos] <= x + 1) {
                    if (clr[pos] == -1) {
                        ans[x] += bl[pos].end() - lower_bound(bl[pos].begin(), bl[pos].end(), b[x]);
                    } else {
                        if (clr[pos] >= b[x]) ans[x] += (int)bl[pos].size();
                    }
                } else {
                    psh(pos);
                    for (int j = l[pos]; j <= x; j++) {
                        // cout << lst[j] << " " << x << "\n";
                        if (lst[j] >= x) ans[x]++;
                    }
                }
            }
        }
    }
    for (int i = 0; i < q; i++) {
        if (typ[i] == "query") cout << ans[i] << "\n";
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:62:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         for (int j = 0; j < v[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20