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Submission #639162

# Submission time Handle Problem Language Result Execution time Memory
639162 2022-09-08T18:54:23 Z CaoHuuKhuongDuy Bob (COCI14_bob) C++14
120 / 120
 118 ms 18084 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long 
typedef pair <int,int> ii;
const int N = 1e3 + 9;
const int oo = 1e10;
int n,m,a[N][N],high[N][N],l[N],r[N],res = 0;
void solve(int a[],int h[],bool kt)
{
    stack <int> s;
    h[0] = -oo;
    s.push(0);
    for (int i = 1;i <= m;i++)
      {
        while (h[i] < h[s.top()] && a[i] == a[s.top()]) s.pop();
        l[i] = s.top() + 1;
        s.push(i);
      }
    while (s.size()) s.pop();
    s.push(m + 1);
    h[m + 1] = -oo;
    for (int i = m;i >= 1;i--)
      {
        while (h[i] <= h[s.top()] && a[i] == a[s.top()]) s.pop();
        r[i] = s.top() - 1;
        s.push(i);
      }
    int lim_r;
    int tmp = res;
    for (int i = 1;i <= m;i++)
      {
        if (kt) tmp = res;
        tmp = res;
        res += (i - l[i] + 1) * (r[i] - i + 1);
        if (a[r[i] + 1] != a[i] || r[i] == m) lim_r = 1;
        else lim_r = h[r[i] + 1] + 1;
        // if (kt && i == m) cout<< res - tmp<<endl;
        res += (h[i] - lim_r) * (i - l[i] + 1) * (r[i] - i + 1) + (lim_r - 1) * (i - l[i] + 1) * (r[i] - i + 1);
        // if (kt) cout<<lim_r<<" ";
        // if (kt) cout<<res - tmp<<endl;
      }  
    // cout<<res - tmp<<endl;
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    // freopen("test.inp","r",stdin);
    // freopen("check1.out","w",stdout);
    cin>>n>>m;
    for (int i = 1;i <= n;i++)
      for (int j = 1;j <= m;j++)
        cin>>a[i][j];
    for (int i = 1;i <= n;i++)
      for (int j = 1;j <= m;j++)
        if (a[i][j] != a[i-1][j]) high[i][j] = 1;
        else high[i][j] = high[i-1][j] + 1;
    for (int i = 1;i <= n;i++)
      solve(a[i],high[i],(i == 2));
    cout<<res;
    return 0;
}

Compilation message

bob.cpp: In function 'void solve(long long int*, long long int*, bool)':
bob.cpp:29:9: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
   29 |     int tmp = res;
      |         ^~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 8132 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 8140 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 8228 KB Output is correct

Subtask #6
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 8148 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 16140 KB Output is correct
2 Correct 69 ms 18040 KB Output is correct
3 Correct 65 ms 17996 KB Output is correct

Subtask #8
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 16012 KB Output is correct
2 Correct 73 ms 18084 KB Output is correct
3 Correct 67 ms 17996 KB Output is correct

Subtask #9
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 16060 KB Output is correct
2 Correct 61 ms 17980 KB Output is correct
3 Correct 66 ms 17996 KB Output is correct

Subtask #10
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 113 ms 16116 KB Output is correct
2 Correct 74 ms 18080 KB Output is correct
3 Correct 59 ms 17960 KB Output is correct