Compilare: main.cpp: In function 'int main()': main.cpp:36:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:38:10: warning: variable 's1' set but not used [-Wunused-but-set-variable] dd s1=s[x][j]; ^~ main.cpp:44:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++)dp[j]=dp1[j],dp1[j]=0; ~^~~~~~~~~~~~ main.cpp:45:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:61:22: warning: self-comparison always evaluates to true [-Wtautological-compare] if(s2.y==s2.y) ~~~~^~~~~~ main.cpp:54:40: warning: unused variable 'l' [-Wunused-variable] int st=0,dr=s[k[i+1]].size(),l=0; ^ main.cpp:80:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<s[x].size();j++) ~^~~~~~~~~~~~ main.cpp:82:10: warning: variable 's1' set but not used [-Wunused-but-set-variable] dd s1=s[x][j]; ^~ main.cpp:21:17: warning: unused variable 'nr' [-Wunused-variable] int n,m,i,j,nr; ^~ main.cpp:19:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.in","r",stdin); ^ main.cpp:20:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.out","w",stdout); ^ main.cpp:22:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:23:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++){scanf("%d",&k[i]);} ^ main.cpp:27:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][j]); ^