oj.uz

Submission #905968

# Submission time Handle Problem Language Result Execution time Memory
905968 2024-01-13T08:10:40 Z AndreyPavlov Lightning Rod (NOI18_lightningrod) C++14
11 / 100
 1200 ms 192784 KB 
/* Includes */
#include <bits/stdc++.h>
#define se second
#define fi first
/* Using libraries */
using namespace std;

/* Defines */
template <class T>
using vc = vector <T>;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
template <class T>
using pq = priority_queue <T, vector <T>, less <T>>;
template <class T>
using pqr = priority_queue <T, vector <T>, greater <T>>;

template<class T>
void output(T &a) {
    for (auto i : a)
        cout << i << ' ';
    cout << '\n';
}

template<class T>
bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

const int inf = 1e18;
const int mod = 1e9 + 7;
const int INF = 1e9;
const int N = 5100;

void solve() {
    int n;
    cin >> n;
    stack <pii> st;
    int ans = 0;
    for (int i = 0; i < n; ++i) {
        int x, y;
        cin >> x >> y;
        if (i == 0 || x - st.top().fi > y - st.top().se) {
            ++ans;
            while (!st.empty() && x - st.top().fi <= st.top().se - y) {
                --ans;
                st.pop();
            }
            st.push({x, y});
        }
    }
    cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int t = 1;
    while (t--) {
        solve();
    }
}

Compilation message

lightningrod.cpp:44:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   44 | const int inf = 1e18;
      |                 ^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1200 ms 192784 KB Output is correct
2 Correct 1189 ms 192040 KB Output is correct
3 Correct 1179 ms 186892 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Incorrect 1 ms 348 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Incorrect 1 ms 348 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Incorrect 1 ms 348 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1156 ms 147816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1200 ms 192784 KB Output is correct
2 Correct 1189 ms 192040 KB Output is correct
3 Correct 1179 ms 186892 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Incorrect 1 ms 348 KB Output isn't correct
12 Halted 0 ms 0 KB -