#include <bits/stdc++.h>
using namespace std;
struct RYBA
{
int y,c;
long long wynik=0;
long long l=0,s=0,p=0;
long long suma=0;
RYBA(int yy=0, int cc=0)
{
y=yy;
c=cc;
wynik=0;
l=0;s=0,p=0;
suma=0;
}
bool operator <(const RYBA &B)const
{
return y<B.y;
}
};
vector<RYBA>V[100009];
long long max_weights(int N, int M, int *X, int *Y, int *W)
{
for(int i=0;i<M;i++)
{
V[X[i]+1].push_back(RYBA(Y[i]+1,W[i]));
}
for(int i=1;i<=N;i++)
{
V[i].push_back({N+1,0});
V[i].push_back({0,0});
sort(V[i].begin(),V[i].end());
}
for(int i=2;i<=N;i++)
{
int Hl,Hp=0;
long long l=0,p=0,s=0;
for(int j=0;j<V[i].size();j++)
{
while(Hl<V[i-1].size()&&V[i-1][Hl].y<=V[i][j].y-1)
{
l+=V[i-1][Hl].c;
Hl++;
}
while(Hp<V[i+1].size()&&V[i+1][Hp].y<=V[i][j].y-1)
{
p+=V[i+1][Hp].c;
Hp++;
}
V[i][j].l=l;
V[i][j].s=s;
V[i][j].p=p;
V[i][j].suma=l+s+p;
s+=V[i][j].c;
}
}
for(int i=0;i<V[1].size();i++)
{
V[1][i].wynik=V[1][i].suma;
}
long long WYNIK=0;
for(int i=1;i<=N;i++)
{
int h;
long long maxx;
h=0;maxx=0;
for(int j=0;j<V[i].size();j++)
{
if(h<V[i-1].size()&&V[i-1][h].y<=V[i][j].y-1)
{
maxx=max(maxx,V[i-1][h].wynik-V[i-1][h].s-V[i-1][h].p);
h++;
}
V[i][j].wynik=max(V[i][j].wynik,maxx+V[i][j].suma);
}
h=V[i-1].size()-1;maxx=0;
for(int j=V[i].size()-1;j>=0;j--)
{
if(h>=0&&V[i][j].y<V[i-1][h].y-1)
{
maxx=max(maxx,V[i-1][h].wynik);
h--;
}
V[i][j].wynik=max(V[i][j].wynik,maxx+V[i][j].suma-V[i][j].s-V[i][j].l);
WYNIK=max(WYNIK,V[i][j].wynik);
}
}
return WYNIK;
}
/**int main()
{ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int X[4]={0, 1, 4, 3};
int Y[4]={2, 1, 4, 3};
int W[4]={5, 2, 1, 3};
long long w=max_weights(5, 4, X, Y, Y);
cout<<w<<endl;
return 0;
}**/
Compilation message
fish.cpp: In function 'long long int max_weights(int, int, int*, int*, int*)':
fish.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
39 | for(int j=0;j<V[i].size();j++)
| ~^~~~~~~~~~~~
fish.cpp:41:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | while(Hl<V[i-1].size()&&V[i-1][Hl].y<=V[i][j].y-1)
| ~~^~~~~~~~~~~~~~
fish.cpp:46:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
46 | while(Hp<V[i+1].size()&&V[i+1][Hp].y<=V[i][j].y-1)
| ~~^~~~~~~~~~~~~~
fish.cpp:58:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for(int i=0;i<V[1].size();i++)
| ~^~~~~~~~~~~~
fish.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for(int j=0;j<V[i].size();j++)
| ~^~~~~~~~~~~~
fish.cpp:70:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<RYBA>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
70 | if(h<V[i-1].size()&&V[i-1][h].y<=V[i][j].y-1)
| ~^~~~~~~~~~~~~~
fish.cpp:41:19: warning: 'Hl' may be used uninitialized in this function [-Wmaybe-uninitialized]
41 | while(Hl<V[i-1].size()&&V[i-1][Hl].y<=V[i][j].y-1)
| ^~
/usr/bin/ld: /tmp/ccWO4adw.o: in function `main':
grader.cpp:(.text.startup+0x25e): undefined reference to `max_weights(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status
