제출 #202837

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
202837		bash	Art Exhibition (JOI18_art)	C++17	100 / 100	376 ms	48376 KiB

art

/**
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*/
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
 
#define F first
#define S second
#define endl '\n'
#define deb(x) cout<<#x<<' '<<x<<endl;
#define pb push_back
 using namespace __gnu_pbds;
using namespace std;

typedef tree<
int,
null_type,
less<int>,
rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;

#ifdef IZI_KATKA
#define int __int64_t
#else
#define int __int64_t
#endif

const long long MOD = 1e9 + 7;
const long long MAXN = 1e6 + 1;

typedef long long ll;

#define pii pair<int,int>
 
long long readInt() {
    bool minus1 = false;
    long long result = 0;
    char ch;
    ch = getchar();
    while (true) {
        if (ch == '-') break;
        if (ch >= '0' && ch <= '9') break;
        ch = getchar();
    }
    if (ch == '-') minus1 = true; else result = ch-'0';
    while (true) {
        ch = getchar();
        if (ch < '0' || ch > '9') break;
        result = result*10 + (ch - '0');
    }
    if (minus1)
        return -result;
    else
        return result;
}
pii a[MAXN];
int pref[MAXN];

main() {
	#ifdef IZI_KATKA
	assert(freopen("input", "r", stdin));
    assert(freopen("output", "w", stdout));
    #endif
    int n = readInt();
    for (int i = 1; i <= n; i++) {
		a[i] = {readInt(),  readInt()};
    }
    sort(a + 1, a + 1 + n);
    for (int i = 1; i <= n; i++) {
    	pref[i] = pref[i - 1] + a[i].S;
    }
	set <int> kek;
	int ans = a[1].S;
	kek.insert(a[1].F);
	for (int i = 2; i <= n; i++) {
		ans = max(ans, a[i].S);
		ans = max(ans, pref[i] - a[i].F + *kek.rbegin());				
		kek.insert(-pref[i - 1] + a[i].F);
	}
	cout << ans;
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp:81:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50