Submission #659046

#TimeUsernameProblemLanguageResultExecution timeMemory
659046colazcySob (COCI19_sob)C++17
39 / 110
123 ms9992 KiB
#include <cstdio> #include <cassert> #include <algorithm> #include <vector> #define let const auto #define rep(name,beg,end) for(auto lim_##name = end,name = beg;name <= lim_##name;name++) #define per(name,beg,end) for(auto lim_##name = end,name = beg;name >= lim_##name;name--) #define repn(lim) for(auto REPN_lIM = lim,REPN = 1;REPN <= REPN_lIM;REPN++) #define debug(...) fprintf(stderr,__VA_ARGS__) #define trace() debug("line : %d, Function : %s\n",__LINE__,__FUNCTION__) using ci = const int; constexpr int maxn = 1 << 20,inf = 0x3f3f3f3f; constexpr bool test(ci x,ci p){return (x >> p) & 1;} constexpr bool chk(ci x,ci y){return (x & y) == x;} void ans(ci x,ci y){ std::printf("%d %d\n",x,y); assert(chk(x,y)); } void match(const std::vector<int> &A,const std::vector<int> &B,ci d = 0){ if(A.empty())return; if(A.size() == 1)return ans(A.front(),B.front()); std::vector<int> va[2],vb[2]; va[0].reserve((A.size() + 1) >> 1); va[1].reserve((A.size() + 1) >> 1); vb[0].reserve((B.size() + 1) >> 1); vb[1].reserve((B.size() + 1) >> 1); for(let x : A) va[test(x,d)].push_back(x); for(let x : B) vb[test(x,d)].push_back(x); if(va[0].size() == vb[0].size()){ match(va[0],vb[0],d + 1); match(va[1],vb[1],d + 1); }else{ vb[0].push_back(vb[1].front()); vb[1].erase(vb[1].begin()); match(va[0],vb[0],d + 1); match(va[1],vb[1],d + 1); } } int n,m; int main(){ // std::freopen("match.in","r",stdin); std::scanf("%d %d",&n,&m); std::vector<int> A,B; A.reserve(n); B.reserve(n); rep(i,0,n - 1) A.push_back(i), B.push_back(m + i); match(A,B); return 0; }

Compilation message (stderr)

sob.cpp: In function 'int main()':
sob.cpp:48:15: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     std::scanf("%d %d",&n,&m);
      |     ~~~~~~~~~~^~~~~~~~~~~~~~~
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