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Submission #1036920

# Submission time Handle Problem Language Result Execution time Memory
1036920 2024-07-27T19:45:47 Z ZeroCool Fancy Fence (CEOI20_fancyfence) C++14
0 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define ll long long
#define ar array
#define ld long double
 
const int N = 100;
const int X = 10005;
const int B = 400;
const int M = 200;
const int INF = 1e15;
const int LOG = 63;
const int MOD = 1e9 + 7;
 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,bmi,bmi2,lzcnt,popcnt")

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int f(int h,int w){
	int a = h * (h + 1) / 2;
	int b = w * (w + 1) / 2;
	return (a * b) % MOD;
}

stack<ar<int, 2> > s;

int ans;

void push(int h,int w){
	int sum = 0;
	
	while(s.size() && s.top()[0] > h){
		sum += s.top()[1];
		sum %= MOD;
		ans += f(sum, s.top()[0]);
		ans -= f(sum - s.top()[1], s.top()[0]);
		ans = (ans % MOD + MOD) % MOD;
		s.pop();
	}
	ans -= f(sum, h);
	ans = (ans % MOD + MOD) % MOD;
	s.push(ar<int, 2>{h, sum + w});
}

signed main(){ios_base::sync_with_stdio(false);cin.tie(0);
	int n;
	cin>>n;
	
	while(n--){
		int h, w;
		cin>>h>>w;
		push(h, w);
	}
	push(0, 0);
	cout<<ans;
	
}

Subtask #1
0.0 / 0.0

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

Subtask #2
0 / 12.0

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

Subtask #3
0 / 13.0

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

Subtask #4
0 / 15.0

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

Subtask #5
0 / 15.0

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

Subtask #6
0 / 18.0

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

Subtask #7
0 / 27.0

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