Submission #1246745

#TimeUsernameProblemLanguageResultExecution timeMemory
1246745hainam2k9Sum Zero (RMI20_sumzero)C++20
61 / 100
438 ms23996 KiB
#include <bits/stdc++.h> #define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0) #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout) #define ll long long #define ull unsigned long long #define i128 __int128 #define db long double #define sz(a) ((int)(a).size()) #define pb emplace_back #define pf emplace_front #define pob pop_back #define pof pop_front #define lb lower_bound #define ub upper_bound #define fi first #define se second #define ins emplace #define mp make_pair using namespace std; const int MOD = 1e9+7, MAXN = 4e5+5; const string NAME = ""; int n,q,LG=0; const int pow10[]={1,10,100,1000,10000}; map<ll,int> pos; void calcLG(int n){ while(n>=10) ++LG, n/=10; } int main() { tt; if(fopen((NAME + ".INP").c_str(), "r")) fo; cin >> n; calcLG(n); int* a = new int[n+1]; for(int i = 1; i<=n; ++i) cin >> a[i]; int nxt[LG+1][n+1]; memset(nxt,0x3f,sizeof(nxt)); pos[0]=n+1; ll sum=0; for(int i = n; i>0; --i){ sum+=a[i]; if(pos.count(sum)) nxt[0][i]=pos[sum]-1; nxt[0][i]=min(nxt[0][i],nxt[0][i+1]); pos[sum]=i; } delete[] a; pos.clear(); for(int j = 1; j<=LG; ++j){ for(int i = 1; i<=n; ++i){ int cur=nxt[j-1][i]; for(int k = 1; k<=9; ++k) if(cur<=n) cur=nxt[j-1][cur+1]; nxt[j][i]=cur; } } cin >> q; while(q--){ int l,r,rs=0; cin >> l >> r; for(int i = LG; i>=0; --i){ int cur=nxt[i][l],cnt=1; if(cur>r) continue; for(int j = 1; j<=8; ++j) if(cur<=n&&nxt[i][cur+1]<=r) ++cnt, cur=nxt[i][cur+1]; rs+=cnt*pow10[i], l=cur+1; } cout << rs << "\n"; } }

Compilation message (stderr)

sumzero.cpp: In function 'int main()':
sumzero.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sumzero.cpp:31:45: note: in expansion of macro 'fo'
   31 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
sumzero.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sumzero.cpp:31:45: note: in expansion of macro 'fo'
   31 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
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