제출 #758290

#제출 시각아이디문제언어결과실행 시간메모리
758290teokakabadzeSjeckanje (COCI21_sjeckanje)C++17
110 / 110
826 ms29604 KiB
#include<bits/stdc++.h> #define f first #define s second #define pb push_back #define int long long #define N 500002 #define M 1000000007 #define pii pair<int, int> #define piii pair<pii, int> using namespace std; int n, t[4 * N][2][2], d[N], a[N], q; void build(int v, int l, int r) { int i, j, k, p; if(l == r) { t[v][1][1] = abs(d[l]); return; } int m = (l + r) / 2; build(v * 2, l, m); build(v * 2 + 1, m + 1, r); for(i = 0; i < 2; i++) for(j = 0; j < 2; j++) for(k = 0; k < 2; k++) for(p = 0; p < 2; p++) { if(k && p && d[m] * d[m + 1] < 0) continue; t[v][i][j] = max(t[v][i][j], t[v * 2][i][k] + t[v * 2 + 1][p][j]); } //cout << l << ' ' << r << ' ' << t[v][0][0] << ' ' << t[v][0][1] << ' ' << t[v][1][0] << ' ' << t[v][1][1] << '\n'; } void update(int v, int l, int r, int ind, int val) { int i, j, k, p; if(l == r) { t[v][1][1] = abs(val); return; } int m = (l + r) / 2; if(ind <= m) update(v * 2, l, m, ind, val); else update(v * 2 + 1, m + 1, r, ind, val); for(i = 0; i < 2; i++) for(j = 0; j < 2; j++) { t[v][i][j] = 0; for(k = 0; k < 2; k++) for(p = 0; p < 2; p++) { if(k && p && d[m] * d[m + 1] < 0) continue; t[v][i][j] = max(t[v][i][j], t[v * 2][i][k] + t[v * 2 + 1][p][j]); } } // cout << l << ' ' << r << ' ' << t[v][0][0] << ' ' << t[v][0][1] << ' ' << t[v][1][0] << ' ' << t[v][1][1] << '\n'; } main() { std::ios::sync_with_stdio(0); cin.tie(); int l, r, x, i; cin >> n >> q; for(i = 1; i <= n; i++) { cin >> a[i]; d[i] = a[i] - a[i - 1]; } build(1, 2, n); while(q--) { cin >> l >> r >> x; d[l] += x, d[r + 1] -= x; if(l != 1) update(1, 2, n, l, d[l]); if(r != n) update(1, 2, n, r + 1, d[r + 1]); cout << max(t[1][0][0], max(t[1][0][1], max(t[1][1][0], t[1][1][1]))) << '\n'; } }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp:53:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   53 | main()
      | ^~~~
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