제출 #1291226

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1291226		flo	Sjeckanje (COCI21_sjeckanje)	C++20	0 / 110	1 ms	332 KiB

Main

#include <bits/stdc++.h>
#define task "testing"
#define int long long
#define multitest 0
using namespace std;

struct Data {
	int ans, pre, suf;
};

const int N = 2e5;

int a[N+5];

Data st[4*N+5];

Data merge(Data u, Data v) {
	Data res = {u.ans+v.ans, u.pre, v.suf};
	
	if (u.suf*v.pre < 0) {
		res.ans -= min(abs(u.suf), abs(v.pre));
	}
	
	return res;
}

void upd(int nd, int lf, int rt, int u, int v) {
	if (u < lf || rt < u) return;
	
	if (lf == rt) {
		st[nd].ans = abs(st[nd].suf = (st[nd].pre += v));
		
		return;
	}
	
	int mid = (lf+rt)/2;
	
	upd(nd*2, lf, mid, u, v);
	upd(nd*2+1, mid+1, rt, u, v);
	
	st[nd] = merge(st[nd*2], st[nd*2+1]);
}

void flo(int ID) {
	int n, q; cin >> n >> q;
	
	for (int x = 1; x <= n; x++) cin >> a[x];
	
	for (int x = 1; x < n; x++) {
		upd(1, 1, n-1, x, a[x+1]-a[x]);
	}
	
	while (q--) {
		int l, r, x; cin >> l >> r >> x;
		
		upd(1, 1, n-1, l-1, x);
		upd(1, 1, n-1, r, -x);
		
		cout << st[1].ans << "\n";
	}
}
	
signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);

	if (fopen(task".inp", "r")) {
		freopen(task".inp", "r", stdin);
		freopen(task".out", "w", stdout);
	}
	
	int TCS = 1, ID = 1;

	if (multitest) {
		cin >> TCS;
	}

	while (TCS--) flo(ID++);

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:68:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |                 freopen(task".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:69:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |                 freopen(task".out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 55