제출 #956677

#제출 시각아이디문제언어결과실행 시간메모리
956677Batorgil952Sum Zero (RMI20_sumzero)C++14
61 / 100
346 ms38484 KiB
#include<bits/stdc++.h> #define ll long long #define pb push_back #define mp make_pair using namespace std; const int N=4e5+5; int dp[N][19]; unordered_map< ll, int > M; int main(){ int n, i, j, q, l, r, ans, x; ll s; scanf("%d",&n); s=0; M[0]=0; for(i=1; i<=n; i++){ scanf("%d",&x); s+=x; if(M[s]!=0){ dp[i][0]=M[s]+1; } else{ if(s==0) dp[i][0]=1; else dp[i][0]=-1; } if(dp[i][0]==-1 && i>1){ dp[i][0]=dp[i-1][0]; } else if(i>1) dp[i][0]=max(dp[i][0], dp[i-1][0]); M[s]=i; } for(i=1; i<=n; i++){ for(j=1; j<=18; j++){ if((dp[i][j-1]-1)>0) dp[i][j]=dp[dp[i][j-1]-1][j-1]; else dp[i][j]=-1, j=20; } } scanf("%d",&q); while(q--){ scanf("%d",&l); scanf("%d",&r); ans=0; for(i=18; i>=0; i--){ if(r>=l){ if(dp[r][i]>=l){ ans+=(1<<(i)); r=dp[r][i]; r--; } } } printf("%d\n", ans); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

sumzero.cpp: In function 'int main()':
sumzero.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
sumzero.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |   scanf("%d",&x);
      |   ~~~~~^~~~~~~~~
sumzero.cpp:45:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |  scanf("%d",&q);
      |  ~~~~~^~~~~~~~~
sumzero.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   scanf("%d",&l);
      |   ~~~~~^~~~~~~~~
sumzero.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |   scanf("%d",&r);
      |   ~~~~~^~~~~~~~~
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