Submission #1071573

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071573		TrinhKhanhDung	Bob (COCI14_bob)	C++14	120 / 120	94 ms	18524 KiB

bob

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define v1 vector<ll>
#define v2 vector<vector<ll>>
#define MAX (int)(2003)
#define limit (int)(100003)
#define MOD (ll)(1000000007)
#define INF (int)1e9
#define oo (ll)MASK(62)

template <class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template <class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

using namespace std;

int nRow, nCol;
int board[MAX][MAX];

void sub2()
{
    ll ans = 0;
    for(int u=1; u<=nRow; u++){
        vector<int> a(nCol + 3);
        for(int i=1; i<=nCol; i++) a[i] = board[u][i];
        int dem = 0;
        for(int d=u; d<=nRow; d++){
            for(int i=1; i<=nCol; i++){
                if(a[i] == -1) continue;
                if(board[d][i] != board[u][i]){
                    a[i] = -1;
                    dem++;
                }
            }
            if(dem == nCol) break;
            int cnt = 0;
            for(int i=1; i<=nCol; i++){
                cnt++;
                if(i == nCol || a[i] != a[i + 1]){
                    if(a[i] != -1){
                        ans += 1ll * cnt * (cnt + 1) / 2;
                    }
                    cnt = 0;
                }
            }
        }
    }
    cout << ans;
}

int h[MAX];
void sub4()
{
    ll ans = 0;
    for(int i=1; i<=nRow; i++){
        for(int j=1; j<=nCol; j++){
            if(board[i][j] == board[i-1][j]) h[j]++;
            else h[j] = 1;
        }
        vector<int> L(nCol + 3, 0), R(nCol + 3, 0);
        stack<int> st;
        int tmp = 0;
        for(int j=1; j<=nCol; j++){
            while(!st.empty() && h[st.top()] >= h[j]) st.pop();
            if(st.empty()) L[j] = tmp;
            else L[j] = st.top();
            st.push(j);
            if(j == nCol || board[i][j] != board[i][j + 1]){
                while(!st.empty()) st.pop();
                tmp = j;
            }
        }

        tmp = nCol + 1;
        for(int j=nCol; j>=1; j--){
            while(!st.empty() && h[st.top()] > h[j]) st.pop();
            if(st.empty()) R[j] = tmp;
            else R[j] = st.top();
            st.push(j);
            if(j == 1 || board[i][j] != board[i][j-1]){
                while(!st.empty()) st.pop();
                tmp = j;
            }
        }

        for(int j=1; j<=nCol; j++){
            ans += 1ll * h[j] * (j - L[j]) * (R[j] - j);
        }
    }
    cout << ans;
}

int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);

    cin >> nRow >> nCol;
    for(int i=1; i<=nRow; i++){
        for(int j=1; j<=nCol; j++){
            cin >> board[i][j];
        }
    }

    sub4();

    return 0;
}

• 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