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Submission #742686

# Submission time Handle Problem Language Result Execution time Memory
742686 2023-05-16T17:34:48 Z He_Huanglu Street Lamps (APIO19_street_lamps) C++17
100 / 100
 2364 ms 111812 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 3e5 + 5;
int n, nq, a[N], pre;
set <int> s;
vector <int> vt[N], bit[N];
struct ngu {
    int a, b, c, d, e, f, g;
};
vector <ngu> task;

void upd(int x, int _y, int last, int i) {
    while (x) {
        int y = lower_bound(vt[x].begin(), vt[x].end(), _y) - vt[x].begin();
        while (y < vt[x].size()) {
            bit[x][y] += (i ? last : -last);
            y += (y & -y);
        }
        x -= (x & -x);
    }
}

void up(int x, int y, int u, int v, int last, int i) {
    upd(x, y, last, i);
    upd(x, v + 1, last, 1 - i);
    upd(u - 1, y, last, 1 - i);
    upd(u - 1, v + 1, last, i);
}

void fake_up(int x, int y, int u, int v, int last, int i) {
    task.push_back({0, x, y, u, v, last, i});
    while (x) {
        vt[x].push_back(y);
        vt[x].push_back(v + 1);
        x -= (x & -x);
    }
    x = u - 1;
    while (x    ) {
        vt[x].push_back(y);
        vt[x].push_back(v + 1);
        x -= (x & -x);
    }
}

int get(int x, int _y) {
    int ret = 0;
    while (x <= n) {
        int y = lower_bound(vt[x].begin(), vt[x].end(), _y) - vt[x].begin();
        while (y) {
            ret += bit[x][y];
            y -= (y & -y);
        }
        x += (x & -x);
    }
    return ret;
}

main () {
    cin.tie(0)->sync_with_stdio(0);
    if(fopen("task.inp", "r")) {
        freopen("task.inp", "r", stdin);
        freopen("wa.out", "w", stdout);
    }
    cin >> n >> nq; n++;
    for(int i = 1; i < n; i++) {
        char ch; cin >> ch;
        a[i] = ch - '0';
        if(!a[i]) {
            s.insert(i);
            up(n, pre + 1, i + 1, i, 0, 0);
            pre = i;
        }
    }
    s.insert(0); s.insert(n);
    for(int t = 1; t <= nq; t++) {
        string str; cin >> str;
        if(str == "query") {
            int u, v; cin >> u >> v;
            if(u < v) swap(u, v);
            int tmp = t;
            if(*s.lower_bound(v) < u) tmp = 0;
            task.push_back({1, tmp, u, v, 0, 0, 0});
            while (u <= n) {
                vt[u].push_back(v);
                u += (u & -u);
            }
        }
        else {
            int i; cin >> i;
            a[i] = 1 - a[i];
            if(!a[i]) s.insert(i);
            else s.erase(i);
            int j = *(--(s.lower_bound(i)));
            int k = *s.upper_bound(i);
            fake_up(k, j + 1, i + 1, i, t, a[i]);
        }
    }
    for(int i = 1; i <= n; i++) {
        vt[i].push_back(-1);
        sort(vt[i].begin(), vt[i].end());
        vt[i].resize(unique(vt[i].begin(), vt[i].end()) - vt[i].begin());
        bit[i].resize(vt[i].size());
    }
    for(auto [type, x, y, u, v, last, i] : task) {
//        cout << type << " " << x << " " << y << " " << u << " " << v << " " << last << " " << i << "\n";
        if(type) cout << x - get(y, u) << "\n";
        else up(x, y, u, v, last, i);
    }
    return 0;
}

Compilation message

street_lamps.cpp: In function 'void upd(int, int, int, int)':
street_lamps.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         while (y < vt[x].size()) {
      |                ~~^~~~~~~~~~~~~~
street_lamps.cpp: At global scope:
street_lamps.cpp:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main () {
      | ^~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen("wa.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14320 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14420 KB Output is correct
5 Correct 8 ms 14424 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 266 ms 41616 KB Output is correct
2 Correct 341 ms 45508 KB Output is correct
3 Correct 630 ms 53144 KB Output is correct
4 Correct 1734 ms 93844 KB Output is correct
5 Correct 1589 ms 84724 KB Output is correct
6 Correct 1751 ms 96332 KB Output is correct
7 Correct 1455 ms 76260 KB Output is correct
8 Correct 1014 ms 63816 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14548 KB Output is correct
2 Correct 10 ms 14540 KB Output is correct
3 Correct 10 ms 14560 KB Output is correct
4 Correct 10 ms 14548 KB Output is correct
5 Correct 2364 ms 102988 KB Output is correct
6 Correct 1918 ms 92684 KB Output is correct
7 Correct 1579 ms 82588 KB Output is correct
8 Correct 925 ms 66180 KB Output is correct
9 Correct 120 ms 27400 KB Output is correct
10 Correct 126 ms 34644 KB Output is correct
11 Correct 145 ms 35468 KB Output is correct
12 Correct 1273 ms 78808 KB Output is correct
13 Correct 956 ms 66172 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14548 KB Output is correct
2 Correct 9 ms 14560 KB Output is correct
3 Correct 10 ms 14548 KB Output is correct
4 Correct 10 ms 14676 KB Output is correct
5 Correct 1161 ms 76552 KB Output is correct
6 Correct 1434 ms 89156 KB Output is correct
7 Correct 1750 ms 99992 KB Output is correct
8 Correct 2277 ms 111812 KB Output is correct
9 Correct 423 ms 53576 KB Output is correct
10 Correct 327 ms 49544 KB Output is correct
11 Correct 416 ms 53580 KB Output is correct
12 Correct 370 ms 49604 KB Output is correct
13 Correct 419 ms 53808 KB Output is correct
14 Correct 335 ms 49248 KB Output is correct
15 Correct 1228 ms 83236 KB Output is correct
16 Correct 948 ms 70464 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14320 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 8 ms 14420 KB Output is correct
5 Correct 8 ms 14424 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14428 KB Output is correct
8 Correct 266 ms 41616 KB Output is correct
9 Correct 341 ms 45508 KB Output is correct
10 Correct 630 ms 53144 KB Output is correct
11 Correct 1734 ms 93844 KB Output is correct
12 Correct 1589 ms 84724 KB Output is correct
13 Correct 1751 ms 96332 KB Output is correct
14 Correct 1455 ms 76260 KB Output is correct
15 Correct 1014 ms 63816 KB Output is correct
16 Correct 13 ms 14548 KB Output is correct
17 Correct 10 ms 14540 KB Output is correct
18 Correct 10 ms 14560 KB Output is correct
19 Correct 10 ms 14548 KB Output is correct
20 Correct 2364 ms 102988 KB Output is correct
21 Correct 1918 ms 92684 KB Output is correct
22 Correct 1579 ms 82588 KB Output is correct
23 Correct 925 ms 66180 KB Output is correct
24 Correct 120 ms 27400 KB Output is correct
25 Correct 126 ms 34644 KB Output is correct
26 Correct 145 ms 35468 KB Output is correct
27 Correct 1273 ms 78808 KB Output is correct
28 Correct 956 ms 66172 KB Output is correct
29 Correct 10 ms 14548 KB Output is correct
30 Correct 9 ms 14560 KB Output is correct
31 Correct 10 ms 14548 KB Output is correct
32 Correct 10 ms 14676 KB Output is correct
33 Correct 1161 ms 76552 KB Output is correct
34 Correct 1434 ms 89156 KB Output is correct
35 Correct 1750 ms 99992 KB Output is correct
36 Correct 2277 ms 111812 KB Output is correct
37 Correct 423 ms 53576 KB Output is correct
38 Correct 327 ms 49544 KB Output is correct
39 Correct 416 ms 53580 KB Output is correct
40 Correct 370 ms 49604 KB Output is correct
41 Correct 419 ms 53808 KB Output is correct
42 Correct 335 ms 49248 KB Output is correct
43 Correct 1228 ms 83236 KB Output is correct
44 Correct 948 ms 70464 KB Output is correct
45 Correct 108 ms 27272 KB Output is correct
46 Correct 216 ms 31540 KB Output is correct
47 Correct 859 ms 57596 KB Output is correct
48 Correct 1742 ms 97080 KB Output is correct
49 Correct 148 ms 36848 KB Output is correct
50 Correct 141 ms 36224 KB Output is correct
51 Correct 170 ms 36988 KB Output is correct
52 Correct 170 ms 37924 KB Output is correct
53 Correct 209 ms 38096 KB Output is correct
54 Correct 173 ms 38084 KB Output is correct