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Submission #704192

# Submission time Handle Problem Language Result Execution time Memory
704192 2023-03-01T22:46:33 Z Markomafko972 Fancy Fence (CEOI20_fancyfence) C++14
30 / 100
 44 ms 3836 KB 
#include <bits/stdc++.h>
#define X first
#define Y second
#define pb push_back
#define pii pair<int, int>
typedef long long ll;
using namespace std;

const int MOD = 1e9 + 7;
const ll INF = 1e18;
const int OFF = (1 << 20);

int n;
pii p[100005];
stack<pii> s;

int add(int x, int y) {
	if (x+y < MOD) return x+y;
	return x+y-MOD;
}

int mul(int x, int y) {
	return (ll)x * (ll)y % MOD;
}

int pot(int x, int y) {
	if (y == 0) return 1;
	if (y == 1) return x;
	int out = pot(x, y/2);
	out = mul(out, out);
	if (y % 2 == 1) out = mul(out, x);
	return out;
}

int main () {

	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	cin >> n;
	for (int i = 0; i < n; i++) cin >> p[i].X;
	for (int i = 0; i < n; i++) cin >> p[i].Y;
	
	int sol = 0;
	for (int i = 0; i <= n; i++) {
		int kol = p[i].Y;
		while (s.size() > 0 && s.top().X >= p[i].X) {
			ll h = s.top().X-p[i].X;
			h *= h+1;
			h /= 2;
			h %= MOD;
			
			ll tren = add(kol, kol);
			tren = add(tren, s.top().Y);
			tren = add(tren, 1);
			tren = mul(tren, s.top().Y);
			tren = mul(tren, pot(2, MOD-2));
			tren = mul(tren, h);
			sol = add(sol, tren);
			
			kol = add(kol, s.top().Y);
			s.pop();
		}
		s.push({p[i].X, kol});
	}
	cout << sol;

	return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 5 ms 600 KB Output is correct
3 Correct 23 ms 1600 KB Output is correct
4 Correct 43 ms 3020 KB Output is correct
5 Correct 44 ms 3136 KB Output is correct
6 Correct 0 ms 328 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 360 KB Output is correct
3 Correct 5 ms 596 KB Output is correct
4 Correct 24 ms 1620 KB Output is correct
5 Correct 42 ms 3048 KB Output is correct
6 Correct 44 ms 3124 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 5 ms 596 KB Output is correct
9 Correct 23 ms 1876 KB Output is correct
10 Correct 43 ms 3740 KB Output is correct
11 Correct 43 ms 3836 KB Output is correct
12 Correct 1 ms 212 KB Output is correct

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -