Submission #284857

#	Time	Username	Problem	Language	Result	Execution time	Memory
284857		3zp	Arcade (NOI20_arcade)	C++14	100 / 100	337 ms	9948 KiB

Arcade

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int x[500009],y[500009];
main(){
    int m, n;
    vector<pair<int,int> > V;
    scanf("%d %d", &m, &n);
    for(int i = 1; i <= n; i++){
        scanf("%d", &x[i]);
    }
    for(int i = 1; i <= n; i++){
        scanf("%d", &y[i]);
        int u = x[i] + y[i];
        int v = x[i] - y[i];
        V.push_back({u, v});
    }
    sort(V.begin(),V.end());
    multiset<int> S;
    for(int i = 0; i < V.size(); i++){
        int x = V[i].second;
        auto it = S.lower_bound(x+1);
        if(it == S.begin()){
            S.insert(x);
            continue;
        }
        it--;
        S.erase(it);
        S.insert(x);
    }
    printf("%d", S.size());
}

Compilation message (stderr)

Arcade.cpp:5:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      |      ^
Arcade.cpp: In function 'int main()':
Arcade.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i = 0; i < V.size(); i++){
      |                    ~~^~~~~~~~~~
Arcade.cpp:31:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::multiset<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   31 |     printf("%d", S.size());
      |             ~^   ~~~~~~~~
      |              |         |
      |              int       std::multiset<int>::size_type {aka long unsigned int}
      |             %ld
Arcade.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |     scanf("%d %d", &m, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Arcade.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |         scanf("%d", &x[i]);
      |         ~~~~~^~~~~~~~~~~~~
Arcade.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |         scanf("%d", &y[i]);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 14 / 14
• Subtask 6: 20 / 20
• Subtask 7: 15 / 15