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Submission #677627

# Submission time Handle Problem Language Result Execution time Memory
677627 2023-01-04T03:47:18 Z jhwest2 Remittance (JOI19_remittance) C++17
0 / 100
 1 ms 352 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const int N = 1010101;
const ll INF = 1e13 + 10;

int n; ll a[N], b[N];
int main() {
    cin.tie(0); ios_base::sync_with_stdio(0);
    cin >> n;
    for (int i = 0; i < n; i++) {
        ll x, y; cin >> x >> y;
        a[i] = b[i] = x - y;
    }

    ll L = -1, R = 1e9 + 10;
    while (L < R) {
        ll M = (L + R) >> 1;
        for (int i = 0; i < n; i++)
            a[i] = b[i];

        int r = 0;
        for (int i = n - 1; i > 0; i--) {
            ll d = M - a[i];
            a[i] += d;
            a[i - 1] -= 2 * d;

            if (a[i] < -INF) {
                r = 1;
                break;
            }
            if (a[i] > INF) {
                r = 2;
                break;
            }
        }
        if (r == 1)
            R = M;
        else if (r == 2)
            L = M + 1;
        else {
            if (a[0] <= M)
                R = M;
            else
                L = M + 1;
        }
    }
    for (int i = 0; i < n; i++)
        a[i] = b[i];

    for (int i = n - 1; i > 0; i--) {
        ll d = L - a[i];
        a[i] += d;
        a[i - 1] -= 2 * d;

        if (a[i - 1] < -INF || a[i - 1] > INF) {
            return !(cout << "No");
        }
    }
    if (a[0] != L)
        return !(cout << "No");
    
    for (int i = n - 1; i >= 0; i--) {
        L = 2 * L - b[i];
        if (L < 0)
            return !(cout << "No");
    }
    cout << "Yes";
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 224 KB Output is correct
2 Correct 1 ms 220 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 220 KB Output is correct
11 Correct 1 ms 352 KB Output is correct
12 Correct 1 ms 224 KB Output is correct
13 Correct 1 ms 224 KB Output is correct
14 Correct 1 ms 224 KB Output is correct
15 Correct 0 ms 336 KB Output is correct
16 Correct 0 ms 224 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 224 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Incorrect 1 ms 224 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 224 KB Output is correct
2 Correct 1 ms 220 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 220 KB Output is correct
11 Correct 1 ms 352 KB Output is correct
12 Correct 1 ms 224 KB Output is correct
13 Correct 1 ms 224 KB Output is correct
14 Correct 1 ms 224 KB Output is correct
15 Correct 0 ms 336 KB Output is correct
16 Correct 0 ms 224 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 224 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Incorrect 1 ms 224 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #3
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 224 KB Output is correct
2 Correct 1 ms 220 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 328 KB Output is correct
10 Correct 1 ms 220 KB Output is correct
11 Correct 1 ms 352 KB Output is correct
12 Correct 1 ms 224 KB Output is correct
13 Correct 1 ms 224 KB Output is correct
14 Correct 1 ms 224 KB Output is correct
15 Correct 0 ms 336 KB Output is correct
16 Correct 0 ms 224 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 224 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Incorrect 1 ms 224 KB Output isn't correct
21 Halted 0 ms 0 KB -