Submission #752512

#	Time	Username	Problem	Language	Result	Execution time	Memory
752512		AtabayRajabli	K-th path (IZhO11_kthpath)	C++11	0 / 100	376 ms	262144 KiB

kthpath

#include <bits/stdc++.h>
#define pb push_back
#define pii pair<int, int>
#define pll pair<ll, ll>
#define MAX 5e4 + 1
#define all(v) v.begin(), v.end()
#define sz(v) v.size()
#define OPT ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define sec second
#define fi first
#define elif else if
#define print(k) cerr << "Ans : "; cout << k << endl;
#define int ll
#define ask(a, b) cout << "? " << a << " " << b << endl;
#define ins insert

typedef long long ll;
typedef unsigned long long ull;
const int oo = INT_MAX;
const int ooo = 0x3F3F3F3F3F3F3F3FLL;
const int mod = 301907;
using namespace std;

string c[35];
vector<vector<int>> wy(35, vector<int>(35, 0));
vector<char> ans;
int a, b, k;

void solve()
{
    cin >> a >> b;

    for(int i = 0 ; i<a; i++)cin >> c[i];

    cin >> k;

    for(int i = 1; i<35; i++)
        for(int j = 1; j<35; j++)
            wy[i][j] = wy[i-1][j] + wy[i][j-1], wy[1][1] = 1;

    string ans(a+b-1, c[0][0]);
    vector<array<int, 2>> now = {{0, 0}}, temp;

    for(int j = 0; j<a+b-1; j++)
    {
        map<char, int> sum;


        for(auto &[x, y] : now)
            sum[c[x][y]] += wy[a-x][b-y];

        for(auto &[x, y] : sum)
        {
            ans[j] = x;
            if(y < k)k -= y;
            else break;
        }

        for(auto &[x, y] : now)
        {
            if(c[x][y] == ans[j])
            {
                if(x+1 < a)
                {
                    temp.pb({x+1, y});
                }
                if(y+1 < b)
                {
                    temp.pb({x, y+1});
                }
            }
        }

        now = temp;
        temp.clear();
    }


    cout << ans;
}

int32_t main()
{
    OPT

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

Compilation message (stderr)

kthpath.cpp: In function 'void solve()':
kthpath.cpp:49:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   49 |         for(auto &[x, y] : now)
      |                   ^
kthpath.cpp:52:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   52 |         for(auto &[x, y] : sum)
      |                   ^
kthpath.cpp:59:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   59 |         for(auto &[x, y] : now)
      |                   ^

• Subtask 1: 0 / 100