Submission #117429

#	Time	Username	Problem	Language	Result	Execution time	Memory
117429		duality	Examination (JOI19_examination)	C++11	2 / 100	3062 ms	165812 KiB

examination

#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 ----------

struct query { int A,B,C,i; };
pii s[100000];
vi a,b;
bool comp(pii a,pii b) {
    return a.first+a.second > b.first+b.second;
}
bool comp2(query a,query b) {
    return a.C > b.C;
}
query queries[100000];
unordered_map<int,int> bit[100001];
int update(int x,int y) {
    int i,j;
    for (i = x+1; i <= a.size(); i += i & (-i)) {
        for (j = y+1; j <= b.size(); j += j & (-j)) {
            if (!bit[i].count(j)) bit[i][j] = 1;
            else bit[i][j]++;
        }
    }
    return 0;
}
int query(int x,int y) {
    int i,j,sum = 0;
    for (i = x+1; i > 0; i -= i & (-i)) {
        for (j = y+1; j > 0; j -= j & (-j)) {
            if (bit[i].count(j)) sum += bit[i][j];
        }
    }
    return sum;
}
int ans[100000];
int main() {
    int i;
    int N,Q;
    scanf("%d %d",&N,&Q);
    for (i = 0; i < N; i++) {
        scanf("%d %d",&s[i].first,&s[i].second);
        a.pb(-s[i].first),b.pb(-s[i].second);
    }
    sort(s,s+N,comp);
    sort(a.begin(),a.end());
    a.resize(unique(a.begin(),a.end())-a.begin());
    sort(b.begin(),b.end());
    b.resize(unique(b.begin(),b.end())-b.begin());
    for (i = 0; i < Q; i++) scanf("%d %d %d",&queries[i].A,&queries[i].B,&queries[i].C),queries[i].i = i;
    sort(queries,queries+Q,comp2);

    int j = 0;
    for (i = 0; i < Q; i++) {
        while ((j < N) && (s[j].first+s[j].second >= queries[i].C)) {
            int x = lower_bound(a.begin(),a.end(),-s[j].first)-a.begin();
            int y = lower_bound(b.begin(),b.end(),-s[j].second)-b.begin();
            update(x,y),j++;
        }
        int x = upper_bound(a.begin(),a.end(),-queries[i].A)-a.begin()-1;
        int y = upper_bound(b.begin(),b.end(),-queries[i].B)-b.begin()-1;
        ans[queries[i].i] = query(x,y);
    }
    for (i = 0; i < Q; i++) printf("%d\n",ans[i]);

    return 0;
}

Compilation message (stderr)

examination.cpp: In function 'int update(int, int)':
examination.cpp:71:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = x+1; i <= a.size(); i += i & (-i)) {
                   ~~^~~~~~~~~~~
examination.cpp:72:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = y+1; j <= b.size(); j += j & (-j)) {
                       ~~^~~~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:92:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&N,&Q);
     ~~~~~^~~~~~~~~~~~~~~
examination.cpp:94:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&s[i].first,&s[i].second);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:102:88: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < Q; i++) scanf("%d %d %d",&queries[i].A,&queries[i].B,&queries[i].C),queries[i].i = i;
                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 0 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57