Submission #129947

#TimeUsernameProblemLanguageResultExecution timeMemory
129947tmwilliamlin168Pairs (IOI07_pairs)C++14
27 / 100
4025 ms47864 KiB
#include <bits/stdc++.h> using namespace std; const int mxN=1e5; int b, n, d, m; long long ans; namespace subtask2 { static const int MG1=1.5e5; array<int, 2> a[mxN]; int ft[MG1]; void upd(int i, int x) { for(++i; i<MG1; i+=i&-i) ft[i]+=x; } int qry(int i) { int r=0; for(; i>0; i-=i&-i) r+=ft[i]; return r; } void solve() { for(int i=0; i<n; ++i) { cin >> a[i][0]; if(b^1) { cin >> a[i][1]; tie(a[i][0], a[i][1])=make_pair(a[i][0]+a[i][1], a[i][0]-a[i][1]-1+m); } } sort(a, a+n); for(int i=0, j=0; i<n; ++i) { while(a[j][0]<a[i][0]-d) upd(a[j++][1], -1); ans+=qry(a[i][1]+d+1)-qry(a[i][1]-d); upd(a[i][1], 1); } } } namespace subtask3 { static const int MG1=223; array<int, 3> a[mxN]; array<int, 4> b[mxN]; int c[MG1+1][MG1+1][MG1+1]; void solve() { for(int i=0; i<n; ++i) { cin >> a[i][0] >> a[i][1] >> a[i][2]; b[i][0]=a[i][0]+a[i][1]+a[i][2]-3; b[i][1]=a[i][0]+a[i][1]-a[i][2]-2+m; b[i][2]=a[i][0]-a[i][1]+a[i][2]-2+m; b[i][3]=a[i][0]-a[i][1]-a[i][2]-1+2*m; } for(int i=0; i<MG1; ++i) { memset(c, 0, sizeof(c)); for(int j=0; j<n; ++j) if(b[j][3]==i) ++c[b[j][0]+1][b[j][1]+1][b[j][2]+1]; for(int j1=1; j1<=MG1; ++j1) { for(int j2=1; j2<=MG1; ++j2) { for(int j3=1; j3<=MG1; ++j3) c[j1][j2][j3]+=c[j1][j2][j3-1]; for(int j3=1; j3<=MG1; ++j3) c[j1][j2][j3]+=c[j1][j2-1][j3]; } for(int j2=1; j2<=MG1; ++j2) for(int j3=1; j3<=MG1; ++j3) c[j1][j2][j3]+=c[j1-1][j2][j3]; } for(int j=0; j<n; ++j) { if(b[j][3]-d<=i&&i<=b[j][3]+d) { int l1=max(b[j][0]-d, 0), r1=min(b[j][0]+d+1, MG1), l2=max(b[j][1]-d, 0), r2=min(b[j][1]+d+1, MG1), l3=max(b[j][2]-d, 0), r3=min(b[j][2]+d+1, MG1); ans+=c[r1][r2][r3]-c[r1][r2][l3]-c[r1][l2][r3]+c[r1][l2][l3]-c[l1][r2][r3]+c[l1][r2][l3]+c[l1][l2][r3]-c[l1][l2][l3]; } } } ans=(ans-n)/2; } } int main() { ios::sync_with_stdio(0); cin.tie(0); cin >> b >> n >> d >> m; if(b<3) subtask2::solve(); else subtask3::solve(); cout << ans; }
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