Submission #1071185

#TimeUsernameProblemLanguageResultExecution timeMemory
1071185sleepntsheepCultivation (JOI17_cultivation)C++17
15 / 100
964 ms596 KiB
#pragma GCC optimize("O3,unroll-loops") #include<cstring> #include <cstdio> #include <algorithm> using namespace std; int C,z=1e9,R, n, x[300], y[300], c[41][41]; int Check(int l, int u, int r, int d) { memset(c,0,sizeof c); for (int i = 0; i < n; ++i) { ++c[max(0, x[i]-u)][max(0, y[i]-l)]; --c[max(0, x[i]-u)][min(40,y[i]+r+1)]; --c[min(40,x[i]+d+1)][max(0, y[i]-l)]; ++c[min(40,x[i]+d+1)][min(40,y[i]+r+1)]; } for(int i=1;i<R;++i)c[i][0]+=c[i-1][0]; for(int j=1;j<C;++j)c[0][j]+=c[0][j-1]; for(int i=1;i<R;++i)for(int j=1;j<C;++j)c[i][j]+=c[i-1][j]+c[i][j-1]-c[i-1][j-1]; for(int i=0;i<R;++i)for(int j=0;j<C;++j)if(!c[i][j])return 0; return 1; } int main() { scanf("%d%d%d", &R, &C, &n); for (int i = 0; i < n; ++i) scanf("%d%d", x + i, y + i), --x[i], --y[i]; for(int l=0;l<=40;++l)for(int r=0;r<=40;++r){ for(int u=0;u<=40;++u){ int lb=-1,ub=41; while(ub-lb>1){ int md=lb+(ub-lb)/2; if(Check(l,u,r,md))ub=md,z=min(z,l+u+r+md); else lb=md; } } } printf("%d",z); }

Compilation message (stderr)

cultivation.cpp: In function 'int main()':
cultivation.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |  scanf("%d%d%d", &R, &C, &n);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:27:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |  for (int i = 0; i < n; ++i) scanf("%d%d", x + i, y + i), --x[i], --y[i];
      |                              ~~~~~^~~~~~~~~~~~~~~~~~~~~~
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