Submission #762643

#	Time	Username	Problem	Language	Result	Execution time	Memory
762643		sysia	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	817 ms	18588 KiB

dango_maker

//Sylwia Sapkowska
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
using namespace std;

void __print(int x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << "'" << x << "'";}
void __print(const char *x) {cerr << '"' << x << '"';}
void __print(const string &x) {cerr << '"' << x << '"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef LOCAL
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

typedef pair<int, int> T;

void solve(){
    int n, m; cin >> n >> m;
    vector a(n+1, vector<char>(m+1));
    for (int i = 1; i<=n; i++){
        for (int j = 1; j<=m; j++){
            cin >> a[i][j];
        }
    }

    auto ok = [&](int i, int j, char c){
        return (i >= 1 && j >= 1 && i <= n && j <= m && a[i][j] == c);
    };
    //0 - obojetne jaki kierunek (oba)
    //1 - w prawo
    //2 - w gore
    int ans = 0;
    // vector dp(n+m+1, vector<vector<int>>(n+3, vector<int>(3)));
    //usunac stan diagonal bo nie uzywam go lol
    for (int diag = 2; diag <= n+m; diag++){
        int curr = 0;
        debug(diag);
        vector dp(n+3, vector<int>(3));
        for (int i = n; i>=1; i--){
            int j = diag-i;
            if (j < 1 || j > m) continue;
            dp[i][1] = max(dp[i+1][1], dp[i+2][0]);
            dp[i][2] = max(dp[i+1][2], dp[i+2][0]);
            if (ok(i, j, 'G') && ok(i-1, j, 'R') && ok(i+1, j, 'W')){
                // dp[diag][i][2] = max(dp[diag][i+1][2] + 1, dp[diag][i+2][0] + 1);
                dp[i][2]++;
            }
            if (ok(i, j, 'G') && ok(i, j-1, 'R') && ok(i, j+1, 'W')){
                dp[i][1]++;
            }
            dp[i][0] = max(dp[i][1], dp[i][2]);
            debug(i, j, dp[i][1], dp[i][2]);
            curr = max(curr, dp[i][0]);
        }
        ans += curr;
    }
    cout << ans << "\n";
}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
    //cin >> t;
    while (t--) solve();

    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 67 / 67