Compilare: main.cpp: In function 'int main()': main.cpp:2:180: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] int MOD=30103;int n,s,i,j, p1=1, p2=1;int exp(int a, int b){int sol=1;for(;b>0;b=b>>1){if(b&1)sol=(sol*a)%MOD;a=(a*a)%MOD;}return sol;}int main(){freopen("functii.in", "r", stdin);freopen("functii.out", "w", stdout);scanf("%d%d", &n, &s);for(i=1;i<=s;i++)p1=(p1*i)%MOD;for(i=n-s+1;i<=n;i++)p2=(p2*i)%MOD;printf("%d\n", ((p2*exp(p1, MOD-2)%MOD)*(exp(2, s)-2))%MOD);return 0;} ^ main.cpp:2:216: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] int MOD=30103;int n,s,i,j, p1=1, p2=1;int exp(int a, int b){int sol=1;for(;b>0;b=b>>1){if(b&1)sol=(sol*a)%MOD;a=(a*a)%MOD;}return sol;}int main(){freopen("functii.in", "r", stdin);freopen("functii.out", "w", stdout);scanf("%d%d", &n, &s);for(i=1;i<=s;i++)p1=(p1*i)%MOD;for(i=n-s+1;i<=n;i++)p2=(p2*i)%MOD;printf("%d\n", ((p2*exp(p1, MOD-2)%MOD)*(exp(2, s)-2))%MOD);return 0;} ^ main.cpp:2:238: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int MOD=30103;int n,s,i,j, p1=1, p2=1;int exp(int a, int b){int sol=1;for(;b>0;b=b>>1){if(b&1)sol=(sol*a)%MOD;a=(a*a)%MOD;}return sol;}int main(){freopen("functii.in", "r", stdin);freopen("functii.out", "w", stdout);scanf("%d%d", &n, &s);for(i=1;i<=s;i++)p1=(p1*i)%MOD;for(i=n-s+1;i<=n;i++)p2=(p2*i)%MOD;printf("%d\n", ((p2*exp(p1, MOD-2)%MOD)*(exp(2, s)-2))%MOD);return 0;} ^