Submission #154000

#	Time	Username	Problem	Language	Result	Execution time	Memory
154000		hocky	NLO (COCI18_nlo)	C++14	22 / 110	989 ms	520 KiB

nlo

//new.cpp
/*
Author : Hocky Yudhiono
Sel 17 Sep 2019 10:53:26  WIB
Current Local Time : 22:53:26

getchar_unlocked > getchar > cin without sync > scanf > cin with sync
bool operator<(const MyStruct& rhs) const

On how to print Long Double to 5 decimal places :
printf("%.5Lf",ans);

On how to get random numbers :
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); //For int
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); //For LL
cout << rng() << endl;
shuffle(isi.begin(),isi.end(),rng);
v.erase(unique(v.begin(),v.end()),v.end());

Don't forget to Modulo when you're doing rolling hash

__gcd(a,b)
__builtin_ffs(a) first on bit
__builtin_clz(a) count leading zero
__builtin_ctz(a) count trailing zero
__builtin_popcount(a) numbers of on bits

*/

//#include <unordered_map>
//#include <unordered_set>

//#include <random>
//#include <chrono>

//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#include <algorithm>
#include <iostream>
#include <cstdlib>
#include <cassert>
#include <cstring>
#include <iomanip>
#include <cstdio>
#include <limits>
#include <string>
#include <vector>
#include <cmath>
#include <deque>
#include <queue>
#include <stack>
#include <map>
#include <set>

//using namespace __gnu_pbds;
using namespace std;

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC optimize(3)
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC target("sse3","sse2","sse")
#pragma GCC target("avx","sse4","sse4.1","sse4.2","ssse3")
#pragma GCC target("f16c")
#pragma GCC optimize("inline","fast-math","unroll-loops","no-stack-protector")
// #pragma GCC diagnostic error "-fwhole-program"
// #pragma GCC diagnostic error "-fcse-skip-blocks"
// #pragma GCC diagnostic error "-funsafe-loop-optimizations"
// #pragma GCC diagnostic error "-std=c++14"
// #pragma GCC target ("string"...)
#pragma GCC push_options
#pragma GCC pop_options
#pragma GCC reset_options
#pragma GCC optimize ("O3")

typedef long long LL;
typedef long double LD;
typedef unsigned long long ULL;
typedef pair<int,int> PII;
typedef pair<long long,long long> PLL;
// typedef tree<long long, null_type, less<long long>, rb_tree_tag, tree_order_statistics_node_update> pbds;
//If the time limit is strict, try not to use long double


#define fbo find_by_order
#define ook order_of_key
#define popf pop_front
#define pf push_front
#define popb pop_back
#define mp make_pair
#define pb push_back
#define remove erase
#define fi first
#define se second

//Remember to undefine if the problem is interactive
#define endl '\n'
#define DEBUG(X) cout << ">>> DEBUG(" << __LINE__ << ") " << #X << " = " << (X) << endl

const double eps = 1e-9;
const int INFMEM = 63;
const int INF = 1061109567;
const LL LINF = 4557430888798830399LL;
const double DINF = numeric_limits<double>::infinity();
const LL MOD = 1000000007;
const int dx[8] = {1,0,-1,0,1,1,-1,-1};
const int dy[8] = {0,1,0,-1,1,-1,1,-1};
const double PI = 3.141592653589793;

#ifdef _WIN32
#define getchar_unlocked getchar
#endif
#define GETCHAR getchar_unlocked
inline void fastll(LL &input_number) 
{
    input_number = 0;
    int ch = GETCHAR();
    int sign = 1;
    while(ch < '0' || ch > '9'){
        if(ch == '-') sign=-1;
        ch = GETCHAR();
    }
    while(ch >= '0' && ch <= '9'){
        input_number = (input_number << 3)+(input_number << 1) + ch-'0';
        ch = GETCHAR();
    }
    input_number *= sign;
}

inline void open(string a){
    freopen((a+".in").c_str(),"r",stdin);
    freopen((a+".out").c_str(),"w",stdout);
}

inline void fasterios(){
    //Do not use if interactive
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}

LL n,m,k;
struct dt{
    LL x,y,r;
};
vector <dt> all;
struct dtl{
    bool isOn;
    LL pos, idx;
    bool operator<(const dtl &other)const{
        if(pos != other.pos) return pos < other.pos;
        if(isOn != other.isOn) return isOn > other.isOn;
        return idx < other.idx;
    }
};

int main(){
    fasterios();
    cin >> n >> m;
    cin >> k;
    for(int i = 1;i <= k;i++){
        dt tmp; cin >> tmp.y >> tmp.x >> tmp.r;
        all.pb(tmp);
    }
    reverse(all.begin(),all.end());
    //Line sweep
    LL ans = 0;
    for(int i = 1;i <= n;i++){
        // cout << "Computing lines " << i << endl;
        vector <dtl> lines;
        lines.pb({1,1,k});
        lines.pb({0,m,k});
        for(int j = 0;j < all.size();j++){
            //for the current 
            LL dist_x = (all[j].x-i);
            LL diff = all[j].r*all[j].r - dist_x*dist_x;
            if(diff < 0) continue;
            diff = sqrtl(diff);
            lines.pb({1,max(0LL,all[j].y-diff),j});
            lines.pb({0,min(m,all[j].y+diff),j});
        }
        sort(lines.begin(),lines.end());
        set <LL> active_lines;
        LL pre = 0;
        for(int j = 0;j < lines.size();j++){
            if(lines[j].isOn == 1){
                if(pre < lines[j].pos-1){
                    LL smallest = *(active_lines.begin());
                    ans += (lines[j].pos-1-pre)*smallest;
                    pre = lines[j].pos-1;
                }
                active_lines.insert(lines[j].idx);
            }else{
                if(pre < lines[j].pos){
                    LL smallest = *(active_lines.begin());
                    ans += (lines[j].pos-pre)*smallest;
                    pre = lines[j].pos;
                }
                active_lines.erase(lines[j].idx);
            }
        }
    }
    cout << ans << endl;
    return 0;
}

Compilation message (stderr)

nlo.cpp:59:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/stack:200000000")
 
nlo.cpp: In function 'int main()':
nlo.cpp:173:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 0;j < all.size();j++){
                       ~~^~~~~~~~~~~~
nlo.cpp:185:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 0;j < lines.size();j++){
                       ~~^~~~~~~~~~~~~~

• Subtask 1: 22 / 110