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Submission #791387

# Submission time Handle Problem Language Result Execution time Memory
791387 2023-07-24T05:05:56 Z peteza Fancy Fence (CEOI20_fancyfence) C++14
0 / 100
 1 ms 352 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;

ll n, h[100005], w[100005];
stack<pll> stk;

ll mod = 1e9+7;
ll cans = 0, csum = 0;

void upd(ll&x){
    if(x<0) x += mod;
    if(x >= mod) x-=mod;
}

int main() {
    cin.tie(0) -> sync_with_stdio(0);
    cin >> n;
    for(int i=0;i<n;i++) cin >> h[i];
    for(int i=0;i<n;i++) cin >> w[i];
    for(int i=0;i<n;i++) {
        cans += (((h[i]+1)*h[i]/2)%mod)*(((w[i]+1)*w[i]/2)%mod);
        ll cw = w[i];
        while(!stk.empty() && stk.top().first > h[i]) {
            cw += stk.top().second;
            csum -= ((1ll*stk.top().first*stk.top().second) % mod);
            upd(csum);
            stk.pop();
        }
        cans += w[i]*csum%mod; upd(cans);
        stk.emplace(h[i], cw);
        csum += cw*h[i]%mod; upd(csum);
        //cout << cans;
    }
    cout << cans;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 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 0 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 352 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 340 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 212 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

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