Submission #112397

#	Time	Username	Problem	Language	Result	Execution time	Memory
112397		keanu	K-th path (IZhO11_kthpath)	C++14	0 / 100	2 ms	256 KiB

kthpath

#include <bits/stdc++.h>

using namespace std;

vector<string> ret;
queue< pair<int, string> > que;
char mapp[32][32];
bool visit[32][32];
int my[2] = {0, 1};
int mx[2] = {1, 0};
int main(){
    int n, m;
    memset(visit, false, sizeof(visit));
    scanf("%d%d", &n, &m);
    for(int i = 0; i < n; i++){
        for(int j = 0; j < m; j++){
            scanf(" %1c", &mapp[i][j]);
        }
    }
    que.push({0, "a"});
    while(!que.empty()){
        int ny = que.front().first/31;
        int nx = que.front().first%31;
        string temp = que.front().second;
        visit[ny][nx] = true;
        que.pop();
        if(ny == n-1 && nx == m-1){
            ret.push_back(temp);
            continue;
        }
        for(int i = 0; i < 2; i++){
            int nexty = ny+my[i];
            int nextx = nx+mx[i];
            if(nexty < 0 || nextx < 0 || nextx > m-1 || nexty > n-1 || visit[nexty][nextx]) continue;
            string nextstring = temp+mapp[nexty][nextx];
            que.push({nexty*31+nextx, nextstring});
        }
    }
    scanf("%d", &n);
    sort(ret.begin(), ret.end());
    cout << ret[n-1] << endl;
}

Compilation message (stderr)

kthpath.cpp: In function 'int main()':
kthpath.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
kthpath.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %1c", &mapp[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~~~
kthpath.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 100