// #include "plants.h"
#include <iostream>
#include <cstdio>
#include <cassert>
#include <vector>
#include <utility>
#include <tuple>
#include <algorithm>
static std::vector<int> r;
static std:: vector<int> x;
static std:: vector<int> y;
static std:: vector<int> answer;
// using namespace std;
#define maxVal 1'000'000'001
static std:: vector<int> inc,dec,rank,lz,lzr,reach,reach2;
static std:: vector<std::pair<int,int>> t,tr;
static std:: vector<std::vector<int>> g, gt, path;
static int l,m,q2,subtask;
void print(std::pair<int,int> p) {std::cout << "(" << p.first << "," << p.second << ") "; };
void print(std::vector<int> &v) {for(int elem: v) std::cout << elem << " "; std::cout << std::endl;}
void print(std::vector<std::vector<int>> &v) {for (auto elem: v) print(elem); std::cout << std::endl;}
void print(std::vector<std::pair<int,int>> &v) {for(auto [a,b]: v) std::cout << "(" << a << "," << b << ") ";std::cout << std::endl;}
std::pair<int,int> update(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int node,int start,int end,int left,int right,int diff) {
if (left <= start and end <= right) lz[node] += diff;
if (start!=end) { lz[2*node] += lz[node]; lz[2*node+1] += lz[node];}
t[node].first += lz[node]; lz[node]=0;
if (right < start or end < left) return {maxVal,m+1};
if (left <= start and end <= right) return t[node];
int mid=(start+end)/2;
auto ans1 = update(t,lz,2*node,start,mid,left,right,diff);
auto ans2 = update(t,lz,2*node+1,mid+1,end,left,right,diff);
auto ans = std::min(ans1,ans2);
t[node] = std::min(t[2*node],t[2*node+1]);
return ans;
}
std::pair<int,int> findMin(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int node, int start, int end, int left, int right) {
if (start!=end) {lz[2*node] += lz[node]; lz[2*node+1] += lz[node];}
t[node].first += lz[node]; lz[node]=0;
if (right < start or end < left) return {maxVal,m+1};
if (left <= start and end <= right) return t[node];
int mid=(start+end)/2;
auto min1 = findMin(t,lz,2*node,start,mid,left,right);
auto min2 = findMin(t,lz,2*node+1,mid+1,end,left,right);
auto ans = std::min(min1,min2);
t[node] = std::min(t[2*node],t[2*node+1]);
return ans;
}
void segInit(std::vector<int> &r, std::vector<std::pair<int,int>> &t, int node, int start, int end) {
if (start==end) {t[node]={r[start],start}; return;}
int mid=(start+end)/2;
segInit(r,t, 2*node,start,mid);
segInit(r,t, 2*node+1,mid+1,end);
t[node] = std::min(t[2*node],t[2*node+1]);
return;
}
int findPreMinI(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int k,int minI1) {
if (minI1>0) {
auto[min2,minI2] = findMin(t,lz,1,0,m-1,std::max(0,minI1-k+1),minI1-1);
if (min2==0) minI1 = minI2;
}
if (minI1-k+1<0) {
auto[min2,minI2] = findMin(t,lz,1,0,m-1,minI1-k+1+m,m-1);
if (min2==0) minI1 = minI2;
}
return minI1;
}
int computeRank(std::vector<std::pair<int,int>> &t, std::vector<int> &lz, int minI1, int k, int ranking) {
if (rank[minI1]!=m) return ranking;
int minI2 = findPreMinI(t,lz,k,minI1);
while (minI2 != minI1) {
ranking = computeRank(t,lz,minI2,k,ranking);
minI2 = findPreMinI(t,lz,k,minI1);
}
rank[minI1] = ranking--;
update(t,lz,1,0,m-1,minI1,minI1,m-1);
update(t,lz,1,0,m-1,std::max(0,minI1-k+1),minI1-1,-1);
if (minI1-k+1<0) update(t,lz,1,0,m-1,minI1-k+1+m,m-1,-1);
return ranking;
}
void reachable(int node, std::vector<std::vector<int>> &g, std::vector<int> &reach) {
if (node==-1 or reach[node]) return;
reach[node] = 1;
for(int elem: g[node])
reachable(elem,g,reach);
return;
}
void calReachability(int k) {
tr.resize(4*m); lzr.resize(4*m);
std::vector<std::pair<int,int>> rankInv;
for(int i=0; i<m; i++) {rank[i] = -rank[i]; rankInv.push_back({rank[i],i}); }
sort(rankInv.begin(),rankInv.end());
segInit(rank,tr,1,0,m-1);
g.resize(m,std::vector<int>(2,-1)); gt.resize(m);
for(auto [val,i]: rankInv) {
std::pair<int,int> temp1, temp2;
temp1 = temp2 = findMin(tr,lzr,1,0,m-1,std::max(0,i-k+1),i-1);
if (i-k+1<0) temp2 = findMin(tr,lzr,1,0,m-1,i-k+1+m,m-1);
temp1 = std::min(temp1,temp2);
if (temp1.first <=0) {g[i][0] = temp1.second;gt[temp1.second].push_back(i);}
temp1 = temp2 = findMin(tr,lzr,1,0,m-1,i+1,std::min(m-1,i+k-1));
if (i+k-1>m-1) temp2 = findMin(tr,lzr,1,0,m-1,0,i+k-1-m);
temp1 = std::min(temp1,temp2);
if (temp1.first <= 0) {g[i][1] = temp1.second;gt[temp1.second].push_back(i);}
update(tr,lzr,1,0,m-1,i,i,m);
}
reach.resize(m); reach2.resize(m);
reachable(0,g,reach);
reachable(0,gt,reach2);
return;
}
void init6(int k, std::vector<int> &r) {
int n = r.size();
t.resize(4*n); lz.resize(4*n);
segInit(r,t,1,0,n-1);
rank.resize(n,n);
int ranking = n-1;
while (ranking >=0) {
auto [min1,minI1] = findMin(t,lz,1,0,n-1,0,n-1);
ranking = computeRank(t,lz,minI1,k,ranking);
}
calReachability(k);
return;
}
void transClosure(int n, int k) {
for (int i=0; i<n; i++)
for(int j=i-k+1+n; j<=i+k-1+n; j++)
if (rank[j%n]<rank[i%n]) g[i][j%n]=1;
for(int x=0; x<n; x++)
for (int i=0; i<n; i++)
for(int j=0; j<n; j++)
g[i][j] = g[i][j] or g[i][x] and g[x][j];
return;
}
void init5(int k, std::vector<int> &r) {
int n = r.size();
t.resize(4*n); lz.resize(4*n); g.resize(n,std::vector<int>(n));
segInit(r,t,1,0,n-1);
rank.resize(n,n);
int ranking = n-1;
while (ranking >=0) {
auto [min1,minI1] = findMin(t,lz,1,0,n-1,0,n-1);
ranking = computeRank(t,lz,minI1,k,ranking);
}
transClosure(n, k);
return;
}
void init4(int k, std::vector<int> &r) {
int n = r.size();
t.resize(4*n); lz.resize(4*n);
segInit(r,t,1,0,n-1);
rank.resize(n,n);
int ranking = n-1;
while (ranking >=0) {
auto [min1,minI1] = findMin(t,lz,1,0,n-1,0,n-1);
ranking = computeRank(t,lz,minI1,k,ranking);
}
return;
}
void init3(int k, std::vector<int> &r) {
int n = r.size();
t.resize(4*n); lz.resize(4*n);
segInit(r,t,1,0,n-1);
rank.resize(n,n);
for(int i=n-1; i>=0; i--) {
auto [min1,minI1] = findMin(t,lz,1,0,n-1,0,n-1);
int min2=1, minI2=minI1;
int min3=1, minI3=minI1;
if (minI1>0) std::tie(min2,minI2) = findMin(t,lz,1,0,n-1,std::max(0,minI1-(n-k)),minI1-1);
if (minI1-(n-k)<0) std::tie(min3,minI3) = findMin(t,lz,1,0,n-1,minI1-(n-k)+n,n-1);
if (min3==0) minI1=minI3;
else if (min2==0) minI1=minI2;
rank[minI1] = i;
update(t,lz,1,0,n-1,minI1,minI1,n-1);
update(t,lz,1,0,n-1,std::max(0,minI1-k+1),minI1-1,-1);
if (minI1-k+1<0) update(t,lz,1,0,n-1,minI1-k+1+n,n-1,-1);
}
return;
}
int findMax(int k, std::vector<int> &r) {
int i=2*m-1;
while (r[i%m]!=0) {i--;}
int j = i-1;
while (j > i-k) {
if (r[j%m]==0) i = j;
j--;
}
for(int j=i; j>i-k; j--) r[j%m]--;
return i%m;
}
void init2(int k, std::vector<int> &r) {
int n = r.size();
rank.resize(n);
for(int i=n-1; i>=0; i--)
rank[findMax(k,r)] = i;
return;
}
void init1(int k, std::vector<int> &r) {
int n = r.size();
inc.resize(n); dec.resize(n);
for(int i=0; i<n; i++) {inc[i] = dec[i] = i;}
int s,incVal,decVal;
for(s=2*n-1; s>=0; s--) {
if (r[s%n]==0) incVal = s;
else decVal = s;
inc[s%n] = incVal; dec[s%n] = decVal;
}
return;
}
void init(int k, std::vector<int> r) {
int n = r.size();
m=n; l=k;
// init6(k,r); return;
if(k==2) init1(k, r);
else if(n<=5000 and 2*k>n) init2(k, r);
else if(2*k>n) init3(k,r);
else if (n<=300 and q2 <= n*(n-1)/2) init5(k,r);
else init4(k,r);
return;
}
int compare_plants6(int x, int y) {
if (reach[y]) return 1;
else if (reach2[y]) return -1;
else return 0;
}
int compare_plants5(int x, int y) {
if (g[x][y]) return 1;
else if (g[y][x]) return -1;
else return 0;
}
int compare_plants2(int x, int y) {
if (rank[x]>rank[y]) return 1;
else return -1;
}
int compare_plants1(int x, int y) {
if (y <= dec[x] or x+m <= inc[y]) return 1;
else if (y <= inc[x] or x+m <= dec[y]) return -1;
return 0;
}
int compare_plants(int x, int y) {
// return compare_plants6(x,y);
if(l==2) return compare_plants1(x,y);
else if(m<=5000 and 2*l>m) return compare_plants2(x,y);
else if(2*l>m) return compare_plants2(x,y);
if (m<=300 and q2 <= m*(m-1)/2) return compare_plants5(x,y);
else return compare_plants2(x,y);
return 0;
}
int main() {
int n,k,q;
q2 = q;
assert(scanf("%d%d%d", &n, &k, &q) == 3);
r.resize(n);
answer.resize(q);
for (int i = 0; i < n; i++) {
int value;
assert(scanf("%d", &value) == 1);
r[i] = value;
}
x.resize(q);
y.resize(q);
for (int i = 0; i < q; i++) {
assert(scanf("%d%d", &x[i], &y[i]) == 2);
}
fclose(stdin);
init(k, r);
for (int i = 0; i < q; i++) {
answer[i] = compare_plants(x[i], y[i]);
}
for (int i = 0; i < q; i++) {
printf("%d\n", answer[i]);
}
fclose(stdout);
return 0;
}
Compilation message
plants.cpp: In function 'void transClosure(int, int)':
plants.cpp:137:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
137 | for (int i=0; i<n; i++)
| ^~~
plants.cpp:140:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
140 | for(int x=0; x<n; x++)
| ^~~
plants.cpp:143:46: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
143 | g[i][j] = g[i][j] or g[i][x] and g[x][j];
plants.cpp: At global scope:
plants.cpp:20:19: warning: 'subtask' defined but not used [-Wunused-variable]
20 | static int l,m,q2,subtask;
| ^~~~~~~
plants.cpp: In function 'int main()':
plants.cpp:266:8: warning: 'q' is used uninitialized in this function [-Wuninitialized]
266 | q2 = q;
| ~~~^~~
plants.cpp: In function 'void init1(int, std::vector<int>&)':
plants.cpp:220:37: warning: 'decVal' may be used uninitialized in this function [-Wmaybe-uninitialized]
220 | inc[s%n] = incVal; dec[s%n] = decVal;
plants.cpp:220:18: warning: 'incVal' may be used uninitialized in this function [-Wmaybe-uninitialized]
220 | inc[s%n] = incVal; dec[s%n] = decVal;
/usr/bin/ld: /tmp/ccqnHqzr.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccefjwbq.o:plants.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
