Compilare: main.cpp: In function 'int LCA(int, int)': main.cpp:91:28: warning: unused variable 'ndn' [-Wunused-variable] int li = 1,lf = 1000,m,ndn,mb,xb,yb; ^~~ main.cpp: In function 'void solve()': main.cpp:131:25: warning: unused variable 'sc' [-Wunused-variable] int x1,y1,x2,y2,a,b,sc,lc; ^~ main.cpp: In function 'void read()': main.cpp:21:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&N,&M,&K); ^ main.cpp:24:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",a[i]+1); ^ main.cpp: In function 'void solve()': main.cpp:137:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d %d%d",&x1,&y1,&x2,&y2); ^ main.cpp: In function 'int main()': main.cpp:147:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.in","r",stdin); ^ main.cpp:148:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.out","w",stdout); ^