Submission #669102

#	Time	Username	Problem	Language	Result	Execution time	Memory
669102		Do_you_copy	Bob (COCI14_bob)	C++17	120 / 120	130 ms	25844 KiB

bob

/*
    I find it wholesome to be alone the greater part of the time.
    To be in company, even with the best, is soon wearisome and dissipating.
    I love to be alone.
    I never found the companion that was so companionable as solitude.
*/
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);

using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e3 + 10;
//const int Mod = 1e9 + 7;
//const int inf =
int n, m;
int a[maxN][maxN];
int high[maxN][maxN];
int l[maxN][maxN];
int r[maxN][maxN];
void Init(){
    cin >> n >> m;
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= m; ++j){
            cin >> a[i][j];
            high[i][j] = (a[i][j] == a[i - 1][j]) ? high[i - 1][j] : 0;
            ++high[i][j];
        }
    }
    ll ans = 0;
    for (int i = 1; i <= n; ++i){
        int j = 1;
        while (j <= m){
            int p = a[i][j];
            int k = j;
            while (j <= m && a[i][j] == p) ++j;
            vector <int> S;
            for (int x = k; x < j; ++x){
                while (!S.empty() && high[i][S.back()] >= high[i][x]) S.pop_back();
                l[i][x] = S.empty() ? k : S.back() + 1;
                S.pb(x);
            }
            S.clear();
            for (int x = j - 1; x >= k; --x){
                while (!S.empty() && high[i][S.back()] > high[i][x]) S.pop_back();
                r[i][x] = S.empty() ? j - 1 : S.back() - 1;
                S.pb(x);
            }
            for (int x = k; x < j; ++x){
                ans += 1LL * high[i][x] * (x - l[i][x] + 1) * (r[i][x] - x + 1);
            }
        }
    }
    cout << ans;
}

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

Compilation message (stderr)

bob.cpp: In function 'int main()':
bob.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bob.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 12 / 12
• Subtask 7: 12 / 12
• Subtask 8: 12 / 12
• Subtask 9: 12 / 12
• Subtask 10: 12 / 12