Compilare: main.cpp: In function 'int main()': main.cpp:3:59: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] using namespace std;int main(){freopen("ssm.in","r",stdin);freopen("ssm.out","w",stdout);int n,a,sum,st,dr,smax,i,x,y;scanf("%d",&n);smax=-2147483648;sum=0;x=1;for(i=1;i<=n;i++){scanf("%d",&a);if(sum<0) {sum=a;x=y=i;}else{sum+=a;y=i;}if(sum>smax){smax=sum;st=x;dr=y;}}printf("%d %d %d\n",smax,st,dr);return 0;} ^ main.cpp:3:89: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] using namespace std;int main(){freopen("ssm.in","r",stdin);freopen("ssm.out","w",stdout);int n,a,sum,st,dr,smax,i,x,y;scanf("%d",&n);smax=-2147483648;sum=0;x=1;for(i=1;i<=n;i++){scanf("%d",&a);if(sum<0) {sum=a;x=y=i;}else{sum+=a;y=i;}if(sum>smax){smax=sum;st=x;dr=y;}}printf("%d %d %d\n",smax,st,dr);return 0;} ^ main.cpp:3:133: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] using namespace std;int main(){freopen("ssm.in","r",stdin);freopen("ssm.out","w",stdout);int n,a,sum,st,dr,smax,i,x,y;scanf("%d",&n);smax=-2147483648;sum=0;x=1;for(i=1;i<=n;i++){scanf("%d",&a);if(sum<0) {sum=a;x=y=i;}else{sum+=a;y=i;}if(sum>smax){smax=sum;st=x;dr=y;}}printf("%d %d %d\n",smax,st,dr);return 0;} ^ main.cpp:3:193: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] using namespace std;int main(){freopen("ssm.in","r",stdin);freopen("ssm.out","w",stdout);int n,a,sum,st,dr,smax,i,x,y;scanf("%d",&n);smax=-2147483648;sum=0;x=1;for(i=1;i<=n;i++){scanf("%d",&a);if(sum<0) {sum=a;x=y=i;}else{sum+=a;y=i;}if(sum>smax){smax=sum;st=x;dr=y;}}printf("%d %d %d\n",smax,st,dr);return 0;} ^