#define DEBUG 0
#include <bits/stdc++.h>
using namespace std;
#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}
// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
public:
template<typename T>
_Debug& operator,(T val) {
cout << val << endl;
return *this;
}
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif
// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back
// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;
// ---------- END OF TEMPLATE ----------
int S[300],E[300];
vi vv;
vector<pair<pii,int> > vv2;
multiset<int> SS;
int main() {
int i;
int R,C,N;
scanf("%d %d %d",&R,&C,&N);
for (i = 0; i < N; i++) scanf("%d %d",&S[i],&E[i]),S[i]--,E[i]--;
int j,k;
int ans = 2e9;
for (i = 0; i < N; i++) {
int u = S[i];
vv.pb(0),vv.pb(R-1);
for (j = 0; j < N; j++) vv.pb(max(S[j]-u-1,0));
for (j = 0; j < R; j++) vv.pb(j);
sort(vv.begin(),vv.end());
vv.resize(unique(vv.begin(),vv.end())-vv.begin());
for (j = 0; j < vv.size(); j++) {
vpii v;
for (k = 0; k < N; k++) {
if ((vv[j] >= S[k]-u) && (vv[j] <= S[k])) v.pb(mp(0,E[k]));
else if (vv[j] > S[k]) v.pb(mp(vv[j]-S[k],E[k]));
}
sort(v.begin(),v.end());
for (k = 0; k < v.size(); k++) SS.insert(v[k].second);
int l = *SS.begin(),r = C-*SS.rbegin()-1,lr = 0;
for (auto it = SS.begin(); it != SS.end(); it++) {
auto it2 = it;
it2++;
if (it2 != SS.end()) lr = max(lr,*it2-*it-1);
}
vv2.pb(mp(mp(R,l),0)),vv2.pb(mp(mp(R,r),1)),vv2.pb(mp(mp(R,lr),2));
for (k = v.size()-1; k >= 0; k--) {
auto it = SS.find(v[k].second);
it = SS.erase(it);
auto it2 = it;
if (it2 == SS.begin()) l = max(l,*it);
else it2--;
if (it == SS.end()) r = max(R,C-*it2-1);
else lr = max(lr,*it-*it2-1);
vv2.pb(mp(mp(v[k].first-1,l),0)),vv2.pb(mp(mp(v[k].first-1,r),1)),vv2.pb(mp(mp(v[k].first-1,lr),2));
}
}
int l = 0,r = 0,lr = 0;
sort(vv2.begin(),vv2.end());
for (j = vv2.size()-1; j >= 0; j--) {
if (vv2[j].first.first < R) ans = min(ans,u+vv2[j].first.first+1+max(l+r,lr));
if (vv2[j].second == 0) l = max(l,vv2[j].first.second);
else if (vv2[j].second == 1) r = max(r,vv2[j].first.second);
else lr = max(lr,vv2[j].first.second);
}
vv.clear(),vv2.clear();
}
printf("%d\n",ans);
return 0;
}
Compilation message
cultivation.cpp: In function 'int main()':
cultivation.cpp:77:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
77 | for (j = 0; j < vv.size(); j++) {
| ~~^~~~~~~~~~~
cultivation.cpp:84:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
84 | for (k = 0; k < v.size(); k++) SS.insert(v[k].second);
| ~~^~~~~~~~~~
cultivation.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
65 | scanf("%d %d %d",&R,&C,&N);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
cultivation.cpp:66:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
66 | for (i = 0; i < N; i++) scanf("%d %d",&S[i],&E[i]),S[i]--,E[i]--;
| ~~~~~^~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
318 ms |
262148 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
318 ms |
262148 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 6 |
Halted |
0 ms |
0 KB |
- |
