Submission #221381

#TimeUsernameProblemLanguageResultExecution timeMemory
221381Leonardo_PaesNautilus (BOI19_nautilus)C++17
100 / 100
139 ms864 KiB
#include <bits/stdc++.h> using namespace std; const int maxn = 510; int r, c, m, ans = 0; bitset<maxn> dp[maxn], mat[maxn], tfg[maxn]; string s; int main(){ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL); cin >> r >> c >> m; for(int i=0; i<r; i++){ for(int j=0; j<c; j++){ char a; cin >> a; if(a == '.') mat[i][c-j-1] = dp[i][c-j-1] = 1; } } cin >> s; for(int j=0; j<s.size(); j++){ if(s[j] == 'N'){ for(int i=0; i<r; i++){ if(i+1 < r) dp[i] = (dp[i+1] & mat[i]); else dp[i].reset(); } } if(s[j] == 'S'){ for(int i=r-1; i>=0; i--){ if(i) dp[i] = (dp[i-1] & mat[i]); else dp[i].reset(); } } if(s[j] == 'E'){ for(int i=0; i<r; i++){ dp[i] = ((dp[i] >> 1) & mat[i]); } } if(s[j] == 'W'){ for(int i=0; i<r; i++){ dp[i] = ((dp[i] << 1) & mat[i]); } } if(s[j] == '?'){ for(int i=0; i<r; i++){ tfg[i] = (dp[i] << 1)|(dp[i] >> 1); if(i) tfg[i] |= dp[i-1]; if(i+1 < r) tfg[i] |= dp[i+1]; tfg[i] &= mat[i]; } for(int i=0; i<r; i++){ dp[i] = tfg[i]; } } } for(int i=0; i<r; i++) ans += dp[i].count(); cout << ans << endl; return 0; }

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:28:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0; j<s.size(); j++){
                  ~^~~~~~~~~
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