Submission #554564

#	Time	Username	Problem	Language	Result	Execution time	Memory
554564		Yazan_Alattar	Bob (COCI14_bob)	C++14	72 / 120	134 ms	25776 KiB

bob

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 1007;
const ll inf = 2e9;
const ll mod = 998244353;
const double pi = acos(-1);
const double eps = 1e-6;
const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
const int block = 320;

ll Add(ll x, ll y){
    x %= mod;
    y %= mod;
    return (x + y) % mod;
}

ll Mul(ll x, ll y){
    x %= mod;
    y %= mod;
    return (x * y) % mod;
}

ll n, m, a[M][M], len[M][M], ans;

void rid(vector < pair <ll,ll> > v){
    ll w = 0;
    while(v.size()){
        ans = Add(ans, Mul(w, Mul(v.back().F, v.back().S)));
        w += v.back().S;
        v.pop_back();
    }
    return;
}


int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    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]) len[i][j] = len[i - 1][j] + 1;
            else len[i][j] = 1;
        }
    }

    for(int i = n; i; --i){
        vector < pair <ll, ll> > v; //h, w

        for(int j = 1; j <= m; ++j){
            if(a[i][j] != a[i][j - 1]) rid(v), v.clear();

            ll w = 0;
            while(v.size() && v.back().F >= len[i][j]){
                ans = Add(ans, Mul(w, Mul(v.back().F, v.back().S)));
                w += v.back().S;
                v.pop_back();
            }
            ans = Add(ans, Mul(w + 1, len[i][j]));

            v.pb({len[i][j], w + 1});
        }

        rid(v);
    }

    cout << ans << endl;
    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: 0 / 12
• Subtask 8: 0 / 12
• Subtask 9: 0 / 12
• Subtask 10: 0 / 12