Submission #1217445

#TimeUsernameProblemLanguageResultExecution timeMemory
1217445hainam2k9Snake Escaping (JOI18_snake_escaping)C++20
100 / 100
559 ms20932 KiB
#include <bits/stdc++.h> #define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0) #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout) #define ll long long #define ull unsigned long long #define i128 __int128 #define db long double #define sz(a) ((int)(a).size()) #define pb emplace_back #define pf emplace_front #define pob pop_back #define pof pop_front #define lb lower_bound #define ub upper_bound #define fi first #define se second #define ins emplace #define mp make_pair using namespace std; const int MOD = 1e9+7, MAXN = 2e6+5; const string NAME = ""; int n,q,a[MAXN],sub[MAXN],sup[MAXN]; int main() { tt; if(fopen((NAME + ".INP").c_str(), "r")) fo; cin >> n >> q; for(int i = 0; i<(1<<n); ++i){ char c; cin >> c; a[i]=c-48; sub[i]=sup[i]=a[i]; } for(int i = 0; i<n; ++i) for(int mask = 0; mask<(1<<n); ++mask){ if((mask>>i)&1) sub[mask]+=sub[mask^(1<<i)]; else sup[mask]+=sup[mask^(1<<i)]; } while(q--){ int maskQ=0,mask1=0,mask0=0,rs=0; for(int i = n-1; i>=0; --i){ char c; cin >> c; if(c=='0') mask0|=1<<i; else if(c=='1') mask1|=1<<i; else maskQ|=1<<i; } if(__builtin_popcount(maskQ)<=6){ for(int mask = maskQ; ; mask=(mask-1)&maskQ){ rs+=a[mask|mask1]; if(mask==0) break; } }else if(__builtin_popcount(mask1)<=6){ for(int mask = mask1; ; mask=(mask-1)&mask1){ if(__builtin_parity(mask1)^__builtin_parity(mask)) rs-=sub[mask|maskQ]; else rs+=sub[mask|maskQ]; if(mask==0) break; } }else{ for(int mask = mask0; ; mask=(mask-1)&mask0){ if(__builtin_parity(mask)) rs-=sup[mask|mask1]; else rs+=sup[mask|mask1]; if(mask==0) break; } } cout << rs << "\n"; } }

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:26:45: note: in expansion of macro 'fo'
   26 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
snake_escaping.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:26:45: note: in expansion of macro 'fo'
   26 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
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