#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 5e3+5;
const int INF = 1e9;
char c[N][N];
int dis[N][N];
int main(){
int n, m;
scanf("%d%d", &n, &m);
for(int i = 1; i <= n; ++i)
for(int j = 1; j <= m; ++j)
scanf(" %c", &c[i][j]), dis[i][j] = INF;
auto check = [&](int x, int y){
return (x >= 1 and x <= n and y >= 1 and y <= m);
};
using node = tuple<int, int, int>;
priority_queue<node, vector<node>, greater<node>> q;
q.push({0, 1, 1});
dis[1][1] = 0;
while(!q.empty()){
int x, y, step;
tie(step, x, y) = q.top();
q.pop();
if(c[x][y] == 'X')
continue;
if(check(x, y+1)){
int add = 0;
if(c[x][y] == 'N')
add++;
else if(c[x][y] == 'W')
add += 2;
else if(c[x][y] == 'S')
add += 3;
if(umin(dis[x][1+y], dis[x][y]+add))
q.push({dis[x][1+y], x, 1+y});
}
if(check(x, y-1)){
int add = 0;
if(c[x][y] == 'S')
add++;
else if(c[x][y] == 'E')
add += 2;
else if(c[x][y] == 'N')
add += 3;
if(umin(dis[x][y-1], dis[x][y]+add))
q.push({dis[x][y-1], x, y-1});
}
if(check(x-1, y)){
int add = 0;
if(c[x][y] == 'W')
add++;
else if(c[x][y] == 'S')
add += 2;
else if(c[x][y] == 'E')
add += 3;
if(umin(dis[x-1][y], dis[x][y]+add))
q.push({dis[x-1][y], x-1, y});
}
if(check(x+1, y)){
int add = 0;
if(c[x][y] == 'E')
add++;
else if(c[x][y] == 'N')
add += 2;
else if(c[x][y] == 'W')
add += 3;
if(umin(dis[x+1][y], dis[x][y]+add))
q.push({dis[x+1][y], x+1, y});
}
}
int answer = dis[n][m];
printf("%d\n", answer);
return 0;
}
Compilation message
adventure.cpp: In function 'int main()':
adventure.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
22 | scanf("%d%d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~
adventure.cpp:25:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
25 | scanf(" %c", &c[i][j]), dis[i][j] = INF;
| ~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
612 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
612 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
360 KB |
Output is correct |
| 2 |
Correct |
0 ms |
356 KB |
Output is correct |
| 3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
612 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
