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Submission #1045384

# Submission time Handle Problem Language Result Execution time Memory
1045384 2024-08-05T22:29:28 Z Uasoni Pyramid Base (IOI08_pyramid_base) C++14
80 / 100
 5000 ms 38320 KB 
#include<bits/stdc++.h>
using namespace std;

const int maxn = 4e5+5, maxp = 1e6+5, inf = 1e9;
int n, m, p, b;
struct R {
    int x1, y1, x2, y2, c;
    R() { x1 = y1 = x2 = y2 = c = 0; }
} obs[maxn];

struct N {
    int v, l;
} stree[4*maxp];
void push(int i) {
    if(stree[i].l != 0) {
        stree[i<<1].v += stree[i].l; stree[i<<1|1].v += stree[i].l;
        stree[i<<1].l += stree[i].l; stree[i<<1|1].l += stree[i].l;
        stree[i].l = 0;
    }
}
void update(int lq, int rq, int val, int i = 1, int l = 1, int r = maxp) {
    if(lq <= l && r <= rq) {
        stree[i].v += val, stree[i].l += val;
        return;
    }
    push(i);
    int mid = (l+r)/2;
    if(lq <= mid) update(lq, rq, val, i<<1, l, mid);
    if(rq >= mid+1) update(lq, rq, val, i<<1|1, mid+1, r);
    stree[i].v = min(stree[i<<1].v, stree[i<<1|1].v);
}
int query(int lq, int rq, int i = 1, int l = 1, int r = maxp) {
    if(lq <= l && r <= rq) return stree[i].v;
    push(i);
    int mid = (l+r)/2, ret = inf;
    if(lq <= mid) ret = min(ret, query(lq, rq, i<<1, l, mid));
    if(rq >= mid+1) ret = min(ret, query(lq, rq, i<<1|1, mid+1, r));
    return ret;
}

struct E {
    int t, val, l, r;
    bool operator<(const E &o) const {
        return t < o.t;
    }
}; vector<E> evs;

bool check(int x) {
    bool ret = false;
    evs.clear();
    for(int i = 1; i <= p; i++) {
        evs.push_back({max(1, obs[i].x1-x+1), obs[i].c, max(1, obs[i].y1-x+1), obs[i].y2});
        evs.push_back({obs[i].x2+1, -obs[i].c, max(1, obs[i].y1-x+1), obs[i].y2});
    }
    sort(evs.begin(), evs.end());
    for(int i = 0; i < evs.size(); i++) {
        update(evs[i].l, evs[i].r, evs[i].val);
        if(i >= evs.size()-1 || evs[i].t != evs[i+1].t) {
            if(evs[i].t+x-1 <= m) ret |= (query(1, n-x+1) <= b);
        }
    }
    return ret;
}

int bsearch(int l, int r) {
    int ret = 0;
    while(l <= r) {
        int mid = (l+r)/2;
        if(check(mid)) l = mid+1, ret = mid;
        else r = mid-1;
    }
    return ret;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> m >> n >> b >> p; // m columns, n rows
    for(int i = 1; i <= p; i++) cin >> obs[i].x1 >> obs[i].y1 >> obs[i].x2 >> obs[i].y2 >> obs[i].c;
    cout << bsearch(1, min(m, n)) << "\n";
}

Compilation message

pyramid_base.cpp: In function 'bool check(int)':
pyramid_base.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<E>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |     for(int i = 0; i < evs.size(); i++) {
      |                    ~~^~~~~~~~~~~~
pyramid_base.cpp:58:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<E>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |         if(i >= evs.size()-1 || evs[i].t != evs[i+1].t) {
      |            ~~^~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12632 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10776 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 10844 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 17152 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24552 KB Output is correct
2 Correct 23 ms 25288 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 25176 KB Output is correct
2 Correct 16 ms 24412 KB Output is correct

Subtask #8
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 10976 KB Output is correct
2 Correct 48 ms 15072 KB Output is correct
3 Correct 42 ms 15068 KB Output is correct

Subtask #9
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 14044 KB Output is correct
2 Correct 213 ms 15832 KB Output is correct
3 Correct 175 ms 17624 KB Output is correct

Subtask #10
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 289 ms 25812 KB Output is correct
2 Correct 81 ms 13528 KB Output is correct
3 Correct 121 ms 25816 KB Output is correct
4 Correct 377 ms 25912 KB Output is correct

Subtask #11
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 406 ms 26072 KB Output is correct
2 Correct 435 ms 26068 KB Output is correct
3 Correct 266 ms 26068 KB Output is correct

Subtask #12
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 407 ms 26068 KB Output is correct
2 Correct 605 ms 26072 KB Output is correct
3 Correct 584 ms 26072 KB Output is correct
4 Correct 604 ms 26072 KB Output is correct
5 Correct 607 ms 26072 KB Output is correct
6 Correct 298 ms 26072 KB Output is correct

Subtask #13
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3878 ms 32432 KB Output is correct
2 Correct 1877 ms 24604 KB Output is correct

Subtask #14
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5060 ms 35096 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #15
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5069 ms 38320 KB Time limit exceeded
2 Halted 0 ms 0 KB -