Submission #201087

#	Time	Username	Problem	Language	Result	Execution time	Memory
201087		SamAnd	Jetpack (COCI16_jetpack)	C++17	80 / 80	25 ms	7920 KiB

jetpack

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
const int N = 100005;

int m;
char a[12][N];

bool c[12][N];
int p[12][N];

int main()
{
    scanf("%d", &m);
    for (int i = 0; i < 10; ++i)
    {
        scanf(" %s", a[i]);
    }
    c[9][0] = true;
    for (int j = 0; j < m - 1; ++j)
    {
        for (int i = 0; i < 10; ++i)
        {
            if (!c[i][j])
                continue;
            if (i == 9)
            {
                if (a[i][j + 1] == '.')
                {
                    c[i][j + 1] = true;
                    p[i][j + 1] = i;
                }
            }
            if (i == 0)
            {
                if (a[i][j + 1] == '.')
                {
                    c[i][j + 1] = true;
                    p[i][j + 1] = i;
                }
            }
            if (i + 1 < 10)
            {
                if (a[i + 1][j + 1] == '.')
                {
                    c[i + 1][j + 1] = true;
                    p[i + 1][j + 1] = i;
                }
            }
            if (i - 1 >= 0)
            {
                if (a[i - 1][j + 1] == '.')
                {
                    c[i - 1][j + 1] = true;
                    p[i - 1][j + 1] = i;
                }
            }
        }
    }
    vector<pair<int, int> > ans;
    int j = m - 1;
    for (int i = 0; i < 10; ++i)
    {
        if (c[i][j])
        {
            while (1)
            {
                if (j == 0)
                    break;
                if (p[i][j] > i || (p[i][j] == i && i == 0))
                {
                    ans.push_back(m_p(j - 1, 1));
                }
                i = p[i][j];
                --j;
            }
            break;
        }
    }
    reverse(ans.begin(), ans.end());
    printf("%d\n", ans.size());
    for (int i = 0; i < ans.size(); ++i)
    {
        printf("%d %d\n", ans[i].first, ans[i].second);
    }
    return 0;
}

Compilation message (stderr)

jetpack.cpp: In function 'int main()':
jetpack.cpp:81:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::pair<int, int> >::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n", ans.size());
                    ~~~~~~~~~~^
jetpack.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < ans.size(); ++i)
                     ~~^~~~~~~~~~~~
jetpack.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
jetpack.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %s", a[i]);
         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 80 / 80