Submission #854893

#	Time	Username	Problem	Language	Result	Execution time	Memory
854893		anhphant	Fancy Fence (CEOI20_fancyfence)	C++14	0 / 100	1038 ms	8284 KiB

fancyfence

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

ll N, H[500007], W[500007];

void initialize() {
    ios_base :: sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if (fopen("FILE.INP", "r")) {
        freopen("FILE.INP", "r", stdin);
        freopen("FILE.OUT", "w", stdout);
    }
    cin >> N;
    for(int i = 1; i <= N; ++i) cin >> H[i];
    for(int i = 1; i <= N; ++i) cin >> W[i];
    cerr << ".";
}

namespace subtask1 {
    ll A[57][57];

    void solve() {
        for(int i = 1; i <= N; ++i) {
            for(int j = 1; j <= H[i]; ++j) {
                A[i][j] = 1;
            }
        }

        for(int i = 1; i <= N; ++i) {
            for(int j = 1; j <= N; ++j) {
                A[i][j] = A[i][j - 1] + A[i - 1][j] + A[i][j] - A[i - 1][j - 1];
            }
        }

        ll ans = 0;

        for(int i = 1; i <= N; ++i) {
            for(int j = 1; j <= N; ++j) {
                for(int k = i; k <= N; ++k) {
                    for(int l = j; l <= N; ++l) {
                        ans += (A[k][l] - A[i - 1][l] - A[k][j - 1] + A[i - 1][j - 1])
                                == ((k - i + 1) * (l - j + 1));
                    }
                }
            }
        }

        cout << ans;
    }

    void process() {
        solve();
    }
}

int main() {
    initialize();
    subtask1 :: process();
}

Compilation message (stderr)

fancyfence.cpp: In function 'void initialize()':
fancyfence.cpp:11:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         freopen("FILE.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fancyfence.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen("FILE.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 18
• Subtask 7: 0 / 27