Compilare: user.cpp: In function ‘int find(int, int)’: user.cpp:20:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();++i) ^ user.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[k][i]==x) ^ user.cpp: In function ‘int find1(int, int)’: user.cpp:29:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();++i) ^ user.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[k][i]==x) ^ user.cpp: In function ‘int main()’: user.cpp:39:12: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>aux + 1; N = 0; ^ user.cpp:49:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=N; i++) ^ user.cpp:53:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (sir[i + dp[i]] == sir[i - dp[i]] && i + dp[i] <= N && i - dp[i] >= 1) ^ user.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(st<=i-dp[i]+1){ ^ user.cpp:73:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ok==1&& st<=i){ ^ user.cpp:87:9: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>aux + 1; N = 0; ^ user.cpp:94:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=N; i++) ^ user.cpp:98:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (sir[i + dp[i]] == sir[i - dp[i]] && i + dp[i] <= N && i - dp[i] >= 1) ^ user.cpp:111:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(st<=i-dp[i]+1){ ^ user.cpp:120:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ok==0&& st<=i){ ^ In file included from /usr/include/string.h:642:0, from user.cpp:7: In function ‘void* memset(void*, int, size_t)’, inlined from ‘int main()’ at user.cpp:92:24: /usr/include/i386-linux-gnu/bits/string3.h:82:32: warning: call to ‘__warn_memset_zero_len’ declared with attribute warning: memset used with constant zero length parameter; this could be due to transposed parameters [enabled by default]