Submission #636018

#	Time	Username	Problem	Language	Result	Execution time	Memory
636018		Do_you_copy	Strah (COCI18_strah)	C++17	0 / 110	56 ms	39732 KiB

strah

#include <bits/stdc++.h>
//#define int long long
#define fi first
#define se second
#define pb push_back
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
using namespace std;
using ll = long long;
using ull = unsigned ll;
using ld = long double;
using pii = pair <int, int>;
using pil = pair <int, ll>;
using pli = pair <ll, int>;
using pll = pair <ll, ll>;
mt19937 Rand(chrono::steady_clock::now().time_since_epoch().count());

ll min(const ll &a, const ll &b){
    return (a < b) ? a : b;
}

ll max(const ll &a, const ll &b){
    return (a > b) ? a : b;
}

//const ll Mod = 1000000007;
//const ll Mod2 = 999999999989;
//only use when required
const int maxN = 2001;
int n, m;
string s[maxN];
ll f[maxN][maxN];
void Init(){
    cin >> n >> m;
    for (int i = 0; i < n; ++i){
        cin >> s[i];
    }
    ll ans = 0;
    for (int i = 1; i <= n; ++i){
        vector <int> S;
        for (int j = 1; j <= m; ++j){
            if (s[i - 1][j - 1] == '#') f[i][j] = 0;
            else f[i][j] = f[i - 1][j] + 1;
            while (!S.empty() && f[i][S.back()] >= f[i][j]) S.pop_back();
            int tem = (S.empty()) ? 0 : S.back();
            ans += f[i][j] * (f[i][j] + 1) * (j - tem) * (j - tem + 1) / 4;
            S.push_back(j);
        }
    }
    cout << ans;
}

#define debu
#define taskname "test"
signed main(){
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        #ifdef debug
        freopen(taskname".out", "w", stdout);
        #endif
    }
    faster;
    ll tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
    if (fopen("timeout.txt", "r")){
        ofstream timeout("timeout.txt");
        timeout << 1000 * double(clock()) / CLOCKS_PER_SEC;
        #ifndef debug
        cerr << "\nTime elapsed: " << 1000 * double(clock()) / CLOCKS_PER_SEC << "ms\n";
        #endif
    }
}

Compilation message (stderr)

strah.cpp: In function 'int main()':
strah.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
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• Subtask 10: 0 / 11