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Submission #959377

# Submission time Handle Problem Language Result Execution time Memory
959377 2024-04-08T06:18:05 Z ALTAKEXE Fancy Fence (CEOI20_fancyfence) C++17
0 / 100
 1 ms 348 KB 
#include<bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define ll long long
const ll mod=1e9+7;
int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin>>n;
	vector<ll> h(n+1,0), w(n+1,0);
	for(int i=0;i<n;++i) cin>>h[i];
	for(int i=0;i<n;++i) cin>>w[i];
	n++;
	vector<pair<ll,ll>> t; 
	t.push_back({0,0});
	ll ans=0;
	for(int i=0;i<n;++i) {
		ll sum=0;
		while(t.back().f>h[i]) { 
			ll mn=max(h[i],t[t.size()-2].f); 
			ll mx=t.back().f-mn; 
			sum=(sum+t.back().s)%mod;
			t.pop_back();
			ans+=(mx*(mx+1)%mod*500000004+mx*mn%mod)*(sum*(sum+1)%mod*500000004)%mod;
			ans%=mod;
		}
		if(t.back().f==h[i]) t.back().s=(t.back().s+(sum+w[i])%mod);
		else t.push_back({h[i], (sum+w[i])%mod});
	}
	cout<<ans<<endl;
	return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 344 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

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

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

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

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 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 348 KB Output is correct
2 Incorrect 1 ms 344 KB Output isn't correct
3 Halted 0 ms 0 KB -