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>
using namespace std;
#define int long long
#define mp make_pair
#define pb push_back
using ll = long long;
using ld = long double;
void solve(int T);
void pre();
const int mxn = 1e6 + 5;
const int SQRT = 500;
const int LOG = 20;
const int inf = 1e18;
const int mod = 1e9 + 7;
const ld eps = 1e-9;
int32_t main(){
pre();
int tt = 1;
//cin>>tt;
for(int i = 1;i<=tt;i++)solve(i);
return 0;
}
void pre(){
#ifdef ONLINE_JUDGE
ios::sync_with_stdio(false);
cin.tie(0);
#endif
}
int A[mxn];
vector<int> g[mxn];
int dir[4][2] = {
{1,0},
{-1,0},
{0,1},
{0,-1}
};
int n,m;
bool in(int x,int y){
return x >= 0 && y >= 0 && x<n && y < m;
}
bool cen[mxn];
bool vis[mxn];
int ccnt = 0;
vector<int> cmp;
void dfs(int x){
vis[x] = true;
if(!cen[x])cmp.push_back(A[x]);
else ccnt++;
for(auto v : g[x]){
if(vis[v])continue;
dfs(v);
}
}
inline int hesh(int a,int b){
return a * m + b;
}
void solve(int T){
cin>>n>>m;
for(int i = 0;i<n;i++){
for(int j = 0;j<m;j++){
cin>>A[hesh(i,j)];
}
}
int k;
cin>>k;
int ans = 0;
for(int i = 0;i<k;i++){
int x,y;
cin>>x>>y;
int u = hesh(x,y);
cen[u] = true;
ans += A[u];
for(int j = 0;j<4;j++){
int nx = x + dir[j][0];
int ny = y + dir[j][1];
if(!in(nx,ny))continue;
int v = hesh(nx,ny);
g[u].push_back(v);
g[v].push_back(u);
}
}
for(int i = 0;i<n;i++){
for(int j = 0;j<m;j++){
int u = hesh(i,j);
if(!vis[u] && cen[u]){
ccnt = 0;
cmp.clear();
dfs(u);
if(cmp.size() < 3 * ccnt){
cout<<"No"<<endl;
return;
}
sort(cmp.begin(), cmp.end());
for(int k = 1;k<= 3 * ccnt;k++){
ans += cmp[cmp.size() - k];
}
}
}
}
cout<<ans<<endl;
}
컴파일 시 표준 에러 (stderr) 메시지
covering.cpp: In function 'void solve(long long int)':
covering.cpp:118:19: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
118 | if(cmp.size() < 3 * ccnt){
| ~~~~~~~~~~~^~~~~~~~~~
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