Submission #62756

#	Time	Username	Problem	Language	Result	Execution time	Memory
62756		jjwdi0	화살표 그리기 (KOI18_arrowH)	C++11	100 / 100	86 ms	16688 KiB

arrow

#include <bits/stdc++.h>
using namespace std;

int N;
vector<int> v[100005];
long long ans;

int main() {
    scanf("%d", &N);
    for(int i=1, x, y; i<=N; i++) scanf("%d %d", &x, &y), v[y].push_back(x);
    for(int i=1; i<=N; i++) sort(v[i].begin(), v[i].end());
    for(int i=1; i<=N; i++) {
        if(v[i].size() == 1) continue;
        for(int j=0; j<v[i].size(); j++) {
            if(j == 0) ans += 1LL * (v[i][j+1] - v[i][j]);
            else if(j == v[i].size() - 1) ans += 1LL * (v[i][j] - v[i][j-1]);
            else ans += min(v[i][j+1] - v[i][j], v[i][j] - v[i][j-1]);
        }
    }
    printf("%lld\n", ans);
}

Compilation message (stderr)

arrow.cpp: In function 'int main()':
arrow.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<v[i].size(); j++) {
                      ~^~~~~~~~~~~~
arrow.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             else if(j == v[i].size() - 1) ans += 1LL * (v[i][j] - v[i][j-1]);
                     ~~^~~~~~~~~~~~~~~~~~
arrow.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
arrow.cpp:10:57: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1, x, y; i<=N; i++) scanf("%d %d", &x, &y), v[y].push_back(x);
                                   ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 12 / 12
• Subtask 3: 29 / 29
• Subtask 4: 38 / 38