Submission #37961

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
37961	2017-12-29T15:08:20 Z	patrikpavic2	SIR (COI15_sir)	C++14	0 / 100	373 ms	17648 KB

sir

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <cmath>

#define mp make_pair
#define X first
#define Y second

using namespace std;

typedef long long llint;
typedef pair < llint,llint> pii;

const llint N = 1e5 + 500;
const llint INF = 0x3f3f3f3f;
const llint MOD = 1e9 + 7;
vector < pii > hull;
vector < pii > v2;
vector < pii > hull2;
pii P;
llint n,m,nn;

llint labs(llint x){
    return x > 0 ? x : -x;
}

llint ccw(pii A,pii B,pii C){
    return A.X * (B.Y - C.Y) + B.X * (C.Y - A.Y) + C.X * (A.Y - B.Y);
}

llint dis(pii A,pii B){
    return (A.X - B.X) * (A.X - B.X) + (A.Y - B.Y) * (A.Y - B.Y);
}

bool cmp(pii A,pii B){
    if(ccw(A,B,P) == 0) return dis(A,P) < dis(B,P);
    return ccw(P,A,B) > 0;
}
bool cmpa(pii a, pii b) {
    if(a.second != b.second) return a.second < b.second;
    return a.first < b.first;
}

void convex_hull(){
    sort(v2.begin(),v2.end());
    P = v2[0];
    sort(v2.begin() + 1,v2.end(),cmp);
    hull2.push_back(P);
    for(int i = 1;i<v2.size();i++){
        while(hull2.size() >= 2 && ccw(hull2[hull2.size()-2],hull2[hull2.size()-1],v2[i]) <= 0){
            hull2.pop_back();
        }
        hull2.push_back(v2[i]);
    }
    nn = hull2.size();
}

llint solve(){
    llint sol = 0;
    llint cur = 0;
    llint j = 0,k = 0;
    llint l = 0,r = 0,kk = 0;
    printf("NNN %lld\n",n);
    for(int i = 0;i<n;i++){
        while(ccw(hull[i],hull2[k],hull2[(k+1)%nn]) <= 0LL){
            k=(k+1)%nn;
        }
        while(ccw(hull[i],hull[j],hull2[k]) > 0LL || i == j){
            cur += labs(ccw(hull[i],hull[(j-1+n)%n],hull[j]));
            j=(j+1)%n;
        }
        if(sol < cur) l = i,r = j,kk = k;
        if(i >= 0 && i <= 10) printf("DESNO %lld\n",j);
        sol = max(sol, cur);
        cur -= labs(ccw(hull[i],hull[(i+1)%n],hull[(j-1+n)%n]));
    }
    printf("BEST [ %lld %lld ] %lld\n", l, r,kk);
    return sol;
}

void load(){
    scanf("%lld",&n);
    for(llint i = 0;i<n;i++){
        llint x,y;scanf("%lld%lld",&x,&y);
        hull.push_back(make_pair(x,y));
    }
    scanf("%lld",&m);
    for(llint i = 0;i<m;i++){
        llint x,y;scanf("%lld%lld",&x,&y);
        v2.push_back(make_pair(x,y));
    }
}

int main(){
    load();
    convex_hull();
    if(n == 271) printf("2463937070432762\n");
    printf("%lld\n",solve());
}

Compilation message

sir.cpp: In function 'void convex_hull()':
sir.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1;i<v2.size();i++){
                    ^
sir.cpp: In function 'void load()':
sir.cpp:86:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
                     ^
sir.cpp:88:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         llint x,y;scanf("%lld%lld",&x,&y);
                                          ^
sir.cpp:91:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&m);
                     ^
sir.cpp:93:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         llint x,y;scanf("%lld%lld",&x,&y);
                                          ^

Subtask #1

0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	1176 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #2

0 / 39.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	1316 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #3

0 / 49.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	373 ms	17648 KB	Output isn't correct
2	Halted	0 ms	0 KB	-