이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "bits/stdc++.h"
#define int long long
#define fi first
#define se second
#define pb push_back
using namespace std;
const int BIG = 1e18;
const int is_query = -BIG;
struct line {
int m, b;
mutable function<const line*()> succ;
bool operator<(const line& rhs) const {
if (rhs.b != is_query) return m < rhs.m;
const line* s = succ();
if (!s) return 0;
int x = rhs.m;
return b - s->b < (s->m - m) * x;
}
};
struct dynamic_hull : public multiset<line> {
const int inf = BIG;
bool bad(iterator y) {
auto z = next(y);
if (y == begin()) {
if (z == end()) return 0;
return y->m == z->m && y->b <= z->b;
}
auto x = prev(y);
if (z == end()) return y->m == x->m && y->b <= x->b;
int v1 = (x->b - y->b);
if (y->m == x->m) v1 = x->b > y->b ? inf : -inf;
else v1 /= (y->m - x->m);
int v2 = (y->b - z->b);
if (z->m == y->m) v2 = y->b > z->b ? inf : -inf;
else v2 /= (z->m - y->m);
return v1 >= v2;
}
void insert_line(int m, int b) {
auto y = insert({m,b});
y->succ = [=] { return next(y) == end() ? 0 : &*next(y); };
if (bad(y)) { erase(y); return; }
while (next(y) != end() && bad(next(y))) erase(next(y));
while (y != begin() && bad(prev(y))) erase(prev(y));
}
int eval(int x) {
auto l = *lower_bound((line) { x, is_query });
return l.m * x + l.b;
}
};
int N,M,K;
int take_photos(signed N, signed M,signed K,vector<signed>r, vector<signed>c){
int occupied[M][M];
for(int i=0;i<M;i++){
for(int j=0;j<M;j++){
occupied[i][j]=0;
}
}
for(int i=0;i<N;i++){
for(int j=min(r[i],c[i]);j<=max(r[i],c[i]);j++){
for(int k=min(r[i],c[i]);k<=max(r[i],c[i]);k++){
occupied[j][k]=1;
}
}
}
int ans=0;
for(int i=0;i<M;i++){
for(int j=0;j<M;j++){
ans+=occupied[i][j];
}
}
return ans;
}
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