Submission #539331

#TimeUsernameProblemLanguageResultExecution timeMemory
539331SmolBrainLabels (NOI20_labels)C++17
100 / 100
70 ms9076 KiB
// Om Namah Shivaya // GM in 137 days #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace std; using namespace __gnu_pbds; template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; typedef long long int ll; typedef long double ld; #define fastio ios_base::sync_with_stdio(false); cin.tie(NULL) #define endl '\n' #define pb push_back #define conts continue #define all(a) a.begin(), a.end() #define rall(a) a.rbegin(), a.rend() #define yes cout << "YES" << endl #define no cout << "NO" << endl #define ff first #define ss second #define ceil2(x,y) ((x+y-1) / (y)) #define sz(a) a.size() #define setbits(x) __builtin_popcountll(x) #ifndef ONLINE_JUDGE #define debug(x) cout << #x <<" = "; print(x); cout << endl #else #define debug(x) #endif #define rep(i,n) for(int i = 0; i < n; ++i) #define rep1(i,n) for(int i = 1; i <= n; ++i) #define rev(i,s,e) for(int i = s; i >= e; --i) #define trav(i,a) for(auto &i : a) bool iseven(ll n) {if ((n & 1) == 0) return true; return false;} void print(ll t) {cout << t;} void print(int t) {cout << t;} void print(string t) {cout << t;} void print(char t) {cout << t;} void print(double t) {cout << t;} void print(ld t) {cout << t;} template <class T, class V> void print(pair <T, V> p); template <class T> void print(vector <T> v); template <class T> void print(set <T> v); template <class T, class V> void print(map <T, V> v); template <class T> void print(multiset <T> v); template <class T, class V> void print(pair <T, V> p) {cout << "{"; print(p.ff); cout << ","; print(p.ss); cout << "}";} template <class T> void print(vector <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";} template <class T> void print(set <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";} template <class T> void print(multiset <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";} template <class T, class V> void print(map <T, V> v) {cout << "[ "; for (auto i : v) {print(i); cout << " ";} cout << "]";} template<typename T> void amin(T &a, T b) { a = min(a, b); } template<typename T> void amax(T &a, T b) { a = max(a, b); } void usaco(string filename) { freopen((filename + ".in").c_str(), "r", stdin); freopen((filename + ".out").c_str(), "w", stdout); } const int MOD = 1e9 + 7; const int maxn = 1e5 + 5; const int inf1 = 1e9 + 5; const ll inf2 = ll(1e18) + 5; void solve(int test_case) { /* the sequence is uniquely determined by the first element let x = first element, mx = max prefix, mn = min prefix x + mx <= n x <= n - mx x + mn >= 1 x >= 1 - mn 1 - mn <= x <= n - mx if the no.of elements in this range != 1, then the answer is -1 else fix the first element as 1 - mn and generate the final array */ ll n; cin >> n; vector<ll> a(n - 1); rep(i, n - 1) cin >> a[i]; ll mx = 0, mn = 0, curr = 0; rep(i, n - 1) { curr += a[i]; amax(mx, curr); amin(mn, curr); } ll l = 1 - mn, r = n - mx; if (r - l + 1 != 1) { cout << -1 << endl; return; } vector<ll> ans(n); ans[0] = l; rep1(i, n - 1) { ans[i] = ans[i - 1] + a[i - 1]; } rep(i, n) cout << ans[i] << " "; cout << endl; } int main() { fastio; int t = 1; // cin >> t; rep1(i, t) { solve(i); } return 0; }

Compilation message (stderr)

Labels.cpp: In function 'void usaco(std::string)':
Labels.cpp:62:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     freopen((filename + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Labels.cpp:63:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |     freopen((filename + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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