Submission #489685

#	Time	Username	Problem	Language	Result	Execution time	Memory
489685		JerryLiu06	Bob (COCI14_bob)	C++17	120 / 120	133 ms	8224 KiB

bob

// https://oj.uz/problem/view/COCI14_bob

#include <bits/stdc++.h>
 
using namespace std;
 
using ll = long long;
using ld = long double;
using db = double;
using str = string;
 
using pi = pair<int, int>;
using pl = pair<ll, ll>;
using pd = pair<db, db>;
 
using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vpd = vector<pd>;
 
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(0);
#define FASTIOF ios_base::sync_with_stdio(false); fin.tie(0);
 
#define mp make_pair
#define f first
#define s second
 
#define sz(x) (int)(x).size()
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert 
#define ft front()
#define bk back()
#define pb push_back
#define pf push_front
 
#define lb lower_bound
#define ub upper_bound
 
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define R0F(i, a) ROF(i, 0, a)
#define EACH(a, x) for (auto& a : x)
 
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); }
ll fdiv(ll a, ll b) { return a / b - ((a ^ b) < 0 && a % b); }
 
template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
 
template<class T> void remDup(vector<T>& v) { sor(v); v.erase(unique(all(v)), v.end()); }
 
const int MOD = 1e9 + 7;
const int MX = 1e3 + 10;
const ll INF = 1e18;

int N, M, G[MX][MX]; int up[MX][MX], lft[MX]; ll DP[MX], ans = 0;

int main() {
    FASTIO;

    cin >> N >> M; 

    FOR(i, 1, N + 1) {

        stack<int> stck; 
        stck.push(0);

        FOR(j, 1, M + 1) {
            cin >> G[i][j];

            DP[j] = 0; lft[j] = j;

            if (G[i][j] == G[i - 1][j]) {
                up[i][j] = up[i - 1][j] + 1;
            }
            else {
                up[i][j] = 1;
            }
            if (G[i][j] == G[i][j - 1]) {
                lft[j] = lft[j - 1];
            }
            while (up[i][j] <= up[i][stck.top()]) {
                stck.pop();
            }
            int curLft = stck.top(); 
            stck.push(j);

            if (curLft < lft[j]) {
                ans += (DP[j] = (j - lft[j] + 1) * up[i][j]);
            }
            else {
                ans += (DP[j] = DP[curLft] + (j - curLft) * up[i][j]);
            }
        }
    }
    cout << ans;
}

• 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