Submission #1239901

#TimeUsernameProblemLanguageResultExecution timeMemory
1239901hainam2k9Automobil (COCI17_automobil)C++20
10 / 100
6 ms8264 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 = 1e6+5; const string NAME = ""; int k,rs,row[MAXN],col[MAXN]; ll n,m; vector<int> R,C; inline void add(int& a, int b){ a+=b; if(a>=MOD) a-=MOD; } inline void sub(int& a, int b){ a-=b; if(a<0) a+=MOD; } int getsum(ll l, ll r, int dist){ ll a=l+r, b=(r-l)/dist+1; if(b&1) a>>=1; else b>>=1; a%=MOD, b%=MOD; return a*b%MOD; } int main() { tt; if(fopen((NAME + ".INP").c_str(), "r")) fo; cin >> n >> m >> k; fill(row+1,row+n+1,1); fill(col+1,col+m+1,1); for(int i = 1; i<=k; ++i){ char type; int x,y; cin >> type >> x >> y; if(type=='R') row[x]=1ll*row[x]*y%MOD, R.pb(x); else col[x]=1ll*col[x]*y%MOD, C.pb(x); } sort(R.begin(),R.end()); R.resize(unique(R.begin(),R.end())-R.begin()); sort(C.begin(),C.end()); C.resize(unique(C.begin(),C.end())-C.begin()); rs=n*m+1; if(rs&1) rs%=MOD, rs*=n*m/2%MOD, rs%=MOD; else rs=(rs/2)%MOD, rs*=n*m%MOD, rs%=MOD; for(int& x : C) sub(rs,getsum(x,x+(n-1)*m,m)), add(rs,1ll*col[x]*getsum(x,x+(n-1)*m,m)%MOD); for(int& x : R){ int sum=getsum((x-1)*m+1,x*m,1); for(int& y : C){ int val=(x-1)*m+y, mul=1ll*row[x]*col[y]%MOD; sub(rs,1ll*col[y]*val%MOD), add(rs,1ll*mul*val%MOD); sub(sum,val); } sub(rs,sum), add(rs,1ll*row[x]*sum%MOD); } cout << rs; }

Compilation message (stderr)

automobil.cpp: In function 'int main()':
automobil.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)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
automobil.cpp:43:45: note: in expansion of macro 'fo'
   43 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
automobil.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)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
automobil.cpp:43:45: note: in expansion of macro 'fo'
   43 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
#Verdict Execution timeMemoryGrader output
Fetching results...