Submission #117609

#	Time	Username	Problem	Language	Result	Execution time	Memory
117609		duality	Two Antennas (JOI19_antennas)	C++11	13 / 100	118 ms	17784 KiB

antennas

#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 H[200000],A[200000],B[200000];
int ans[2000][2000];
int main() {
    int i;
    int N,Q;
    scanf("%d",&N);
    for (i = 0; i < N; i++) scanf("%d %d %d",&H[i],&A[i],&B[i]);
    if (N <= 2000) {
        int j;
        for (i = 0; i < N; i++) {
            for (j = i+1; j < N; j++) {
                if (((j-i) >= max(A[i],A[j])) && ((j-i) <= min(B[i],B[j]))) ans[i][j] = abs(H[i]-H[j]);
                else ans[i][j] = -1;
            }
        }
        for (i = 3; i <= N; i++) {
            for (j = 0; j <= N-i; j++) ans[j][j+i-1] = max(ans[j][j+i-1],max(ans[j][j+i-2],ans[j+1][j+i-1]));
        }
        int L,R;
        scanf("%d",&Q);
        for (i = 0; i < Q; i++) {
            scanf("%d %d",&L,&R);
            printf("%d\n",ans[L-1][R-1]);
        }
    }

    return 0;
}

Compilation message (stderr)

antennas.cpp: In function 'int main()':
antennas.cpp:63:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
antennas.cpp:64:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < N; i++) scanf("%d %d %d",&H[i],&A[i],&B[i]);
                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:77:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&Q);
         ~~~~~^~~~~~~~~
antennas.cpp:79:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d %d",&L,&R);
             ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 65