Submission #489320

#	Time	Username	Problem	Language	Result	Execution time	Memory
489320		Kalashnikov	Divide and conquer (IZhO14_divide)	C++17	17 / 100	1 ms	332 KiB

divide

#include <bits/stdc++.h>
 
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
 
using namespace std;
using ll = long long;
 
const int N = 2e5+5 , inf = 2e9 + 7;
const ll INF = 1e18 ,   mod = 1e9+7 , P = 6547;

int l[N] , os[N] , x[N] , g[N] , d[N];

ll spusk(int i , int dop = 0) {
	if(i == 1) return g[i];

	if(x[i]-x[i-1] <= dop+d[i-1]) {
		return 1ll * g[i] + spusk(i-1 , dop - (x[i]-x[i-1]) + d[i-1]);
	}
	else {
		return g[i];
	}
}

void solve(int tc) {
	int n;
	cin >> n;
	for(int i = 1; i <= n; i ++) {
		cin >> x[i] >> g[i] >> d[i];
	}
	ll ans = 0;
	for(int i = 1; i <= n; i ++) {
		ans = max(ans , spusk(i , d[i]));
	}
	cout << ans;
}
/*
*/
main() {
	file("divide");
    ios;
    int tt = 1 , tc = 0;
    // cin >> tt;
    while(tt --) {
        solve(++tc);
    }
    return 0;
}

Compilation message (stderr)

divide.cpp:42:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   42 | main() {
      | ^~~~
divide.cpp: In function 'int main()':
divide.cpp:4:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
divide.cpp:43:2: note: in expansion of macro 'file'
   43 |  file("divide");
      |  ^~~~
divide.cpp:4:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
divide.cpp:43:2: note: in expansion of macro 'file'
   43 |  file("divide");
      |  ^~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52